I was someone who played PC games until I discovered MAME, then abandoned PC games to play MAME (especially after I'd destroyed a keyboard playing Track and Field), then discovered that I didn't have time to play PC and MAME...
...so I built a cabinet that now plays MAME, about 8 other emulators AND PC games (mostly the old DOS games), and I can sit in my basement and nobody would hear from me for hours. It's far better, I find, to play KLAX in MAME for a few minutes, then jump to Atari 2600 because Air-Sea Battle is calling you, then Baseball Simulator 1.000 for NES gets a bit of play...
...wonderful if you're borderline ADD.
I agree with Youki - today's PC games are all just variants of the same idea (let's face it - Ultima III & IV defined RPG's for the rest of eternity), and who has the time?
Depending on who you ask, this was a great idea (ask me or my son) or a terrible idea (ask my wife), so perhaps it's possible to have too much...but if you put everything in one place, you might use it all.