Steam backlog shame, since we're all sharing.
I have some big releases on my list that I was super excited to play and I just never found the time to get back to them, or in some cases I bought them and became intimidated by the time commitment.
I grew up playing adventure games and tend to buy a lot of them hoping to recapture that feeling, and like a true addict it takes more and more to get my fix, but realistically I'm empty inside. My backlog of adventure titles is much larger than those listed here, but the ones listed are the ones I really want to get back to.