Tenebrus,
PF Sorcerers are very cool. Especially after APG. ( Archetypes <3 ) Protean and Shadow bloodlines are quite fun...
And, yeah, there are a lot of bad PrC:s... it's largely a problem with how Base classes were originally designed, and other things... 3.X has been very, very educational. And really, PF house rules are the best DnDish rules, especially after APG came out (although, like usual, there were a couple of idiotic things. )
Conan D20 works, since there really isn't casting, by default, so the brainpower can be spent on figuring out the combat system. Plus, armor as DR and an armor piercing value on weapons just makes tons of sense to me.
Cthulhu D20 also works, since there are NO class features. You get your 7 feats and that's it. It's pretty cool, actually, and shows how robust the core mechanic really is.
...Wow, rambling. What were we talking of, anyway?