Here's the latest installment of my column "The Clans inside": 
1. We have already cited "intolerance/arrogance" and "fanaticism" as "typical Clan virtues". But there's a third "virtue" that dominates the Warrior Caste of the Clans especially: It's "impatience" (or the feeling of having not enough time)
Warriors do not make long-term plans, because they do not have the time for it. (see below) This feeling permeates their whole behaviour, resulting in extreme impatient warriors. It makes them impulsive (even volatile) and prone to act on the spur of the moment. Most simply try to seize the right moment when it comes, but that is about it.
The Trials reinforce/support this attitude. Have a problem of any kind? Call a Trial! One way or the other, the matter at hand will be resolved now.
It also influences their behaviour in combat: There is nothing as bad as sitting back and waiting, when you could get into the action and prove yourself.
Due to the bidding process, there will almost always someone who is bound to be frustrated by being not included or by being bargained away. These feeling are again channeled by the Trials and taken out on other warriors (or even the lower castes). [Though not again your superior! You would better not call for a Trial of Refusal against your commander's bid.]
The only notable exception to this phenomen is the so-called "Kerensky Vision": The warriors of the Kerensky bloodline are said to possess some dgrees of patience (though in varying amounts). Still, there are exceptions even to this like Natasha Kerensky who had virtually none at all.
Where does this feeling of having not enough time / the pressure of proving yourself quickly through combat stem from?
From the Eugenics system!
Clan warriors don't have long (compared to Inner Sphere warriors) to prove their worth of being included in the breeding program by gaining a Bloodname. As this it the only way of having your genes included in future generations of warriors, it is the highest aim a Clan Warrior can achieve. [Rank by itself is surely nice, but the Bloodname is the only thing that counts. In fact, many warriors do not even aim at the higher ranks, content in their place and doing their duty, but will risk everything to gain one of the coveted (and scarce) bloodnames.]
Regarding Age and the "have not enough time" syndrome, here are some age brackets for a Clan Warrior:
20: Out the sibko, the 'real' life of a warrior begins.
30: The warrior will be considered "old" and probably on his way down.
35: Now considered "Ancient", the warrior will be removed from frontline duty to either train new warriors or to hunt bandits in disgrace (which might also be your fate earlier, depending on your record).
45: So you did not have the good sense to die by now, warrior? Well, your fighting days are finally and totally over. You now good for nothing but caring for infants.
A bloodname extends your stay in active duty and guarantees your place in the breeding programm.
2. Clanners do not lie! In fact, many clanners are simply unable to grasp the concept of lying, automatically assuming that everything their opponents tells them is the pure truth.
While there might be some instances of "obfuscating" the truth, this will usually be greatly despised as dishonourable, as will any kind of duplicity or obvious political maneuvering. (These are unworthy throwbacks to the politicking that orginally drove us out of the IS, quiaff?)

1. We have already cited "intolerance/arrogance" and "fanaticism" as "typical Clan virtues". But there's a third "virtue" that dominates the Warrior Caste of the Clans especially: It's "impatience" (or the feeling of having not enough time)
Warriors do not make long-term plans, because they do not have the time for it. (see below) This feeling permeates their whole behaviour, resulting in extreme impatient warriors. It makes them impulsive (even volatile) and prone to act on the spur of the moment. Most simply try to seize the right moment when it comes, but that is about it.
The Trials reinforce/support this attitude. Have a problem of any kind? Call a Trial! One way or the other, the matter at hand will be resolved now.
It also influences their behaviour in combat: There is nothing as bad as sitting back and waiting, when you could get into the action and prove yourself.
Due to the bidding process, there will almost always someone who is bound to be frustrated by being not included or by being bargained away. These feeling are again channeled by the Trials and taken out on other warriors (or even the lower castes). [Though not again your superior! You would better not call for a Trial of Refusal against your commander's bid.]
The only notable exception to this phenomen is the so-called "Kerensky Vision": The warriors of the Kerensky bloodline are said to possess some dgrees of patience (though in varying amounts). Still, there are exceptions even to this like Natasha Kerensky who had virtually none at all.
Where does this feeling of having not enough time / the pressure of proving yourself quickly through combat stem from?
From the Eugenics system!
Clan warriors don't have long (compared to Inner Sphere warriors) to prove their worth of being included in the breeding program by gaining a Bloodname. As this it the only way of having your genes included in future generations of warriors, it is the highest aim a Clan Warrior can achieve. [Rank by itself is surely nice, but the Bloodname is the only thing that counts. In fact, many warriors do not even aim at the higher ranks, content in their place and doing their duty, but will risk everything to gain one of the coveted (and scarce) bloodnames.]
Regarding Age and the "have not enough time" syndrome, here are some age brackets for a Clan Warrior:
20: Out the sibko, the 'real' life of a warrior begins.
30: The warrior will be considered "old" and probably on his way down.
35: Now considered "Ancient", the warrior will be removed from frontline duty to either train new warriors or to hunt bandits in disgrace (which might also be your fate earlier, depending on your record).
45: So you did not have the good sense to die by now, warrior? Well, your fighting days are finally and totally over. You now good for nothing but caring for infants.
A bloodname extends your stay in active duty and guarantees your place in the breeding programm.
2. Clanners do not lie! In fact, many clanners are simply unable to grasp the concept of lying, automatically assuming that everything their opponents tells them is the pure truth.
While there might be some instances of "obfuscating" the truth, this will usually be greatly despised as dishonourable, as will any kind of duplicity or obvious political maneuvering. (These are unworthy throwbacks to the politicking that orginally drove us out of the IS, quiaff?)