i have almost no preferences. Because of that (and im probably the most experianced player) i tend to play whatever spot the group needs most.

We are very flexible with characters but we do have some baselines.

1) High powered games, high powered characters allowed
2) not high powered games, high powered characters not allowed
3) Avoid straight group combatibility conflists if possible (someone playing a paladin and someone else playing a cleric of thier most hated evil god enemy)
4) the spirit of the rules means more than the wording
5) What the DM rules is the rule, live with it.

Inside those baselines its pretty much do what you want.