I only have three PS1 games that I never finished, and about 6 months ago I had a look at trying to do just that with one of them, which was the very first Grand Theft Auto. When I first picked it up in the late 90s, I had a few weeks when I played it quite a lot, but I never tried to finish it. I just spent time driving round, being an idiot and getting into trouble. I think I only remember getting on to the second map once, and didn't like it as I was so used to the first one, so never bothered getting any further.

Fast forward to last year, and I booted it up on my PS3 to give it a long due proper attempt, but I just couldn't play it. The frame rate was so low, and its weird constant zooming in and out style just made me feel so sick.
A few weeks back I had the plan of trying the PC version, so again got a cheap copy from ebay, and installed it using DOSBox. While it's a little better, it still has all the same issues sadly. I think most of the slow down and jankinees is because of the zooming in and out, and while I found a cheat that let me zoom in and out manually, it only seemed to work while I was stationary, and when I started to move, the game resumed the auto zooming.
Also, for some weird reason, the game (or DOSBox) pays no attention when I try to limit the frame rate, which I tried to do just to try and smooth it out a bit.

Oh well. Whatever. It's not like I haven't got dozens of other games to try and finish instead.