The difference is, The Ghost, you have not dealt with the other four players at the table. You've presented the group with a number of possibilities. And that's great. But, a number of those possibilities are not favourable, or outright bar, one character's concept. If the other players choose options that screw over one player, what do you do?
I'll use an example here from the current campaign I am playing in. It is a D&D 3.5 edition, Forgotten Realms campaign setting game set in the Silver Marches region. The party consist of a Dwarf Ranger/Deepwarden, a Halfling Paladin/Cavalier, a Gnome Wizard/Loremaster, and a Human Spirit Shaman/Void Disciple.
Thus far we have traveled through plains, hills, forests, and mountains; in addition we have delved four dungeons for a total of twenty combat encounters. The combats break down as follows:
Cities - One (1)
Dungeons - Nine (9)
Forests - Six (6)
Hills - Two (2)
Mountains - One (1)
Plains - One (1)
Of those twenty encounters, nine of them the Halfling Paladin was mounted. Six of them the Halfling was able to use Charge/Spirited Charge. And two of them he was able to use Ride-By Attack. (I have been keeping rather detailed notes of this campaign.)
Now, I think I can state - with absolute certainty - that the majority of these encounters were not in terrain favorable to the mounted knight concept. And, at least five of them (four dungeon and one city) outright barred the concept from being used.
Now, I can appreciated that some people see this as "A bad thing!". I do. However, with the people that I play with, this is the dynamic that
we chose. The DM didn't need to sit down with us and tell us why going into the forests or dungeons would result in the Halfling Paladin unable to "do his thing". He gave us options, told us what was out there in the world, and asked us what we wanted to do.
We decided.
For the record, I play the Halfling Paladin/Cavalier.
Rechan is saying, all the options presented, or at least almost all of them, will favour all character concepts as much of the time as possible, and if the players consistently choose options that block one player's concept, then he'll step in and have a conversation with everyone.
I understand what Rechan is saying. I asked the questions I did to further my understanding of what he was saying. He obliged me in my requests.
But, likely that won't even come up, since he controls the options and choosing options that consistently sideline one character probably won't happen unless the other players are deliberately trying to screw over one player.
In my experience, even the most minor details can (and often will) be read by players as hooks. Sometimes players will, inadvertently, choose an option that screws themselves over.