You seem to have an interesting definition of "immerson". I fail to see how skills and feats defeat immersion in any way. QUOTE]
You are entitled to your opinion. For me they interfere in 2 ways: 1. they reduce actions to video button feel (jump, bluff, tumble) and they create overly complicated PCs *highly customised, where the player is forced to look at their PC sheet to remember what powers they have and can use, what their stacked chances to do anything in particular is etc. etc. This need to search there paper and then do math brings them out of their imagination (breaking the concentration) and reminds them there just playing a game with rules (compare that with 1E or OD&D, with simplistic PCs). Feats and skills also give a since of predictability (as these chances are rolled on a D20 system rather then a table system which puts the power in the hands of the DM).
I realize Merric B and others have stated they do not experiance these problems. And I realize not everyone plays D&D for the same reason (some actually prefer stacking, building unique characters with powers, and in-game use of skills as actions). But, my players seem to find 3E too confusing, and have stated they have a hard time getting into the game because of it. Who knows, maybe its a difference in how brains are wired, or just getting enough experiance under your belt.