Temple of Elemental Evil - terrible encounter design and quest/area/plot that didn't give me much incentive to continue once I ran out of non-evil quests to do for the temple priests. They should have used that engine for a strategy RPG without all the bullshit, similar to how KoTC worked. Also several other attempts where I completed Hommlet and then quit the game in disgust, vowing not to touch it again.
Ultima 7 - I repeatedly tried to play it, but I kept realizing that it was an adventure game, not an RPG and I hate adventure games.
KoTR 2 - I gave up on it when I realized that the combat wasn't going to get tactical or challenging and that the fan difficulty mods weren't well balanced yet.
Might and Magic 6 and 7 - I find that the blobber formula isn't rewarding enough to justify the time invested. I did get pretty far in these, because they had a lot of fun innovations and streamlining, but eventually I just lost interest because blobber gameplay is inherently mundane.
Natuk - Quit after ~6 hours since I hadn't used any tactical movement, aside from sitting in a corridor so that only a few enemies could attack me at a time. I also hadn't really needed to think about my moves very much.
Darklands - Played for around 20 hours, but got bored after seeing the same text encounters too many times.
Realms of Arkania: Star Trail - Played for a fair number of hours, but I had followed some advice from the RPG Codex forums on designing my characters. Unfortunately, it turned out that this advice was designed to trivialize the combat so that I could "focus on the other parts of the game". I didn't want the combat to be trivialized, so I quit and never bothered re-starting.
Morrowwind - Messed around for a while, found the action combat boring, quit.
Gothic 1 and 2 - Messed around for a while, found the action combat boring, quit.
Prelude to Darkness - I played for a good 6 plus hours, despite crashing at least 10 times each hour, but I eventually reached some empty and unfinished areas and quit, feeling very disappointed.
Betrayal at Kronder - I played for many hours, but I eventually became disoriented because two areas looked exactly the same due to the early 3D graphics. At that point I took a break and never picked the game back up.
Space Rangers 2 - I didn't want to play poorly translated text adventures or shitty RTS missions, so I turned them off as soon as possible. After about 6 hours or so I felt like I hadn't really been doing anything particularly entertaining, so I quit.
Etrian Odyssey 3 - Arguably the best modern blobber and a vast improvement over the previous games in the series. Lost interest when I realized that I'd wasted hours and hours following builds from the internet that were only ever going to be able to do one thing, over and over. Also, I was still mostly just engaging in mundane tasks.
I did finish Arcanum and Bloodlines but I deeply, deeply regret doing so.
