I've been thinking about games that I had wanted for years as a kid, finally got my hands on, then immediately disliked/horribly failed at/just never finished. Most of these games are now rare, and too obscure to be prolific on eBay or archived on abandonware sites, so it makes it difficult to finally get closure.
So I ask you, what are your white whales, and did you ever get to finish them?
Mine is /maabus/61-8012/. A demo disc I owned had a trailer for it that was mind-bendingly cheesy, yet awesome.
It was an ecologically themed adventure game with proto-QTEs and a bizarre plot, and it played like pureed ass. I lost the discs years ago, and while it is available through some websites, I'm not sure if I want to face that disappointment again just yet. But mark my words, I WILL finish it one of these days.