You just can't put so much pressure on your self to consume everything. Gamers are especially bad at not wanting to miss out on a potentially great experience, so they purchase all these great games, don't play, then feel guilty for it.
If you want to support devs and want to have a large library, go ahead, spend the $40 on 15 new games, but don't put so much pressure on your self to play through them all. Play a few for the first hour, if your not feeling it, just move on.
If you can skip a few major releases of a genre, then hop back in, you get that sense of 'wow' again, since you didn't see the incremental improvements from release to release.
For instance, I am not picking up GTA5 this year. I played 4, and just wasn't feeling it, so I will skip 5, and in a few years when 6 comes out and I'll give it a try. Chances are, skipping 5 will just leave me blown away by 6.