I think gaming keyboards offer better feedback, especially in the after-press when the keys spring back. I prefer scissor-action keyboards (although the Apple is not my favourite) for general typing though, as they used to cause me to hammer less on the keyboard.
I'm not a monster gamer or anything, although I'm certainly equipped for it. I do prefer using full-travel keys for gaming though. The Dell keyboard referred to above - especially the one with the wrist rest and the media keys - is actually not bad, a similar feel to the Logitech G15.