Are there any particular games that you would say you enjoyed a lot that you do not anticipate that you will ever finish (despite them being reasonably finishable)?
yes but these tend to fall into several limited cases, which i'm not sure whether to classify as reasonable finishable:
1) cases where i started the game, got to near the end of the game, but then lost my save file (losing a memory card, hard drive crash, or whatever), and i don't want to go through most of the game again just to finish it up
2) cases where i lost the game itself, or where someone borrowed the game before i was finished with the game, and never returned it, so i never had opportunity to finish it; this also includes cases where the game cd becomes unreadable, cases where my console breaks, and cases where the game crashes so much that it becomes unplayable at a certain point in the game without crashing every few minutes
3) cases where i've died several times at a particular stumbling block and became too frustrated to ever get past that particularly hard part of the game
4) cases where i like a game so much that i don't want to ruin the perfect experience by continuing to play it to the point where i find something which takes away from the perfection of the game so far, where i'd rather preserve the memory of it as it is than change that memory (this has only happened once so far that i can recall, with the game persona 2)