One thing i've noticed, as I get better at this game, is that I am learning which clubs fit which situations, and depending on the course im playing (as long as I know the course and have played there).
My home course, I use the clubs listed in my signature. But when I play another local club im a member at, I take out the 3 wood, put my 2 iron (42.25 inch shaft) in the bag because it has 4 very narrow fairways on holes that are too short to pull a driver on without ending up in bunkers protecting the greens(More confidence with the 2i than a wood off the tee), and pull my 48* wedge in favor of my 60, because its saved me on two holes (* and 9, back to back) where there are retaining walls ~20 feet left of the green. Any less than my 60, and I cant get out without playing the ball backwards, where with the 60, I can pop it straight out while perpendicular to the wall, and have a chance at getting on the green, as long as my ball isn't up against the wall. I always seem to end up down this side at least once per round at this course.
Then there is the 9 hole muni I play on Saturdays with little 'bro' (BBBS program), where I take out the the normal 3 wood and put in my 'strong' 3 wood (12.5or 13*, im not exactly sure), because it has two really long par 5's (First hole is a 505 par 5, and 5th is a 591 par 5). The first I can usually get on in two with a driver/3w, but the 591 I have never, ever got on in 2, so Driver/3W leaves laid up in front of the water hazard protecting an elevated green, leaving me a perfect wedge shot up hill, which i've gotten very good at doing.
When im playing links golf (5 or 6 times a year, I play without hybrids, as I find the sandy base just makes iron play so much easier to me, so i go with 2-GW, with no hybrids, and a 60 and 64 for those horrible, frustrating pot bunkers.
So what about you guys? Is your bag set and stone, or do you mix and match your clubs to the course you are playing.