Thanks for all the responses, folks. I take some heart in knowing at least some of how I feel isn't entirely foreign.
To answer or comment on some assorted responses:
1) I am 28, started with an NES at 7, and I indeed grew up with Nintendo, with a PS2 being my only non-Nintendo system right now. It was purchased at the start of the Cube's rut. XD
2) I played WoW for about two years and raided for only half of that. I go back in from time to time for events, new content, leveling alts, but I have no inclination to seriously raid again. I have started playing Dungeon Fighter Online, enjoying the beat-'em-up combat. I hope the community and the rest of the game catch up its quality, though.
3) Concerning indie games: I'm finding some solace in knowing that there are developers doing something different in ways that seem more like an evolution of the concepts and genres I enjoy. A friend of mine showed me Spewer and it made me exclaim "How has someone not made something like this before now? This is awesome!"
4) Just knowing someone coined the term "G.A.S." makes me feel a little better.
5) I've got a major issue going on in my life right now that eats at my emotional availability and financial flexibility. In truth, there's dozens of titles I missed out on in the first half of the decade that I'm dying to play, but time and money constraints make it hard to finally catch up. For example, I only started Ratchet and Clank 2 several weeks ago. (The latest PS3 title excites me, by the by.) Part of what bothered me was wondering what I really had to look forward to once I do adequately catch up on those titles.
Again, thanks for the all the responses, folks. They certainly picked me up. (Including the ones about "maintaining perspective."

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