It's a trick question, because IMO everyone has little ticks and stuff that impacts the fun of other players. Do you recognize yours? If so, do you do anything to ameliorate it? If so, what do you do?
Me, I'm a bit of a control freak. This manifests in various ways.
(1) Players in the two games in which I'm a player look to me with rules questions -- and worse, actual rulings -- before they look to the other DMs. (Even one of the DMs does this.)
(2) I get very impatient when the same players constantly slow the game down. (I growl, "Roll the damn die; if it's a 20, it doesn't matter if you're +8 or +9," or some variant, every single game session.)
(3) I'm similarly impatient when my fellow players make horrible tactical decisions simply because they aren't paying attention. ("I've got a 34 AC, an aberration-bane hammer, 110 HP, and a speed of 20', and you're shooting at the monster on me instead of the monster ripping up the wizard? Seriously?")
(4) I make 90 percent of the decisions for the two groups I play in, and drive the action 90 percent of the time. (I'm not talking about spotlight hogging. For instance, I might suggest, "Nathan, why don't you wild shape and scout things out for us?" At which point the druid and his player rightly have the spotlight.)
That sounds a lot like my situation.
(1) It's a hard one to deal with, because even the DMs have a tendency to take advantage of this kind of "problem player" when they know it'll save them time looking up the rules. This sometimes makes those occasions when a DM and
I disagree about something really awkward - I know that I know the rules better, but he's the DM, something's got to give.
I try to just say "ok, it's your call" in those situations, but sometimes I can't help it and it comes out as "ok, I think you're completely wrong, but let's agree to disagree" which doesn't necessarily go over well.
(2) Yeah. Though pretty often, I remember what their modifier is from watching them agonize over the same check before, so rather than telling them to hurry up, I just tell them what their roll is.
(3) I tend to play hard to kill characters, so unless it looks like they're going to get everyone killed, I tamp it down pretty well, but sometimes you just can't help it... Fortunately, these days I play with friends who know me well enough I always give the heads back after biting them off.

(and it's really something I try to keep under control)
(4) Again, maybe not quite 90%, but it easily could be, if I wanted to or if I let it. Last session, one of the players sort of floored me by going "Ok, you're the de facto party leader, so..." I think this goes hand in hand with playing characters who visibly end up doing most of the heavy lifting when things get tough. I
rarely play characters designed to be the charismatic leader type, though, and tend to role-play them in ways that make it clear they don't want to be in charge. Obviously, as I indicated above, this often doesn't work anyway.
An extreme example of this happened when one of the groups I was in took a break from Shadowrun (in which I actually did end up playing a leader-type, albeit a reluctant one) to play a short GURPS module using pre-generated characters. I picked a 10 year old child prodigy for a change of pace from my battle-scarred Street Sam... and three sessions later, he somehow was in charge of the party. *facepalm*