Well as for fighting games, I only play D-pad. No matter what.
(Dead or alive 4, Virtual fighter 5, Soul calibur IV) But I understand where your comparison is. And I dislike much the direction consoles take with shooters (im going to write a blog post about this some time). Like why can't we map our own buttons-functions? Its a sick and ugly scheme I see almost too often. I want to say 90% really.
Right now on PS3 for shooting I have Fear 2, Killzone 2,resistance , Fall out 3, time crisis 4 , and unreal tournamanet 3. Also to mention I played COD 4.
Out of those seven games , its like this :
Mappable buttons!-
Resistance
Non-Mappable buttons!- (Ala, pre made "control schemes" only)
Fear 2
Killzone 2
Fallout 3
COD4
Other-
UT3- Mouse+ keyboard support (Plus mods. Sony really let them loss with this)
Time crisis 4 (Because you play like a light gun game, with the gun)
Same goes for halo 3 as much as this goes. It doesn't bother me to an extreme, but why do they not let us map the buttons our self? What or where is the harm in them? I kinda convinced myself to pic up one of those mouse things, although Im not touching the converters. Too bad these things are only online to purchase.