Bump because it is quite a good game.
I finished it twice, both with cheats. In one I deliberately gave myself 1 in all stats and only give 1 point in volition and 1 point in endurance (since with 1 hp/morale you can die even with cheats) I then enabled no morality/health death and failed every white(retryable) and red check in the game. My second playthough was a totally maxed out character. I did everything possible, as a completionist. I learned few stuff doing this
-The game/ending more or less is the same but you will miss nuances, I was amazed how much of subtleties that I missed with noskill play, and playing with all skills max also sometimes very fun. To see all the skills saying different things or arguing or disagreeing with etc. Do keep in mind however, maxing all skills can also be detrimental. So feel free to leave some stuff blank, per game rules, high skills also mean extreme, without electrochemistry you will not understand drugs but maxed out extreme electrochemistry will want constatnly bother you to have some fix. I learned this naturally through some combat skill (i forgot) prepared me to a deadly encounter, which turned out to be nothing. Also some dialogue options etc only happen when you succeed in x and fail in y. So you miss some stuff even if you max everything
-You only need 5-6ish checks to finish the game, iirc none of them are red checks. And Most of the white checks can be ignored/failed. It was also funny to see failing a check 2 times or even 3 times enabled new dialogue options. And sometimes failing a red check gave you success anyways through other means. So yeah just as in skill maxing, succeeding in everything can be detrimental, feel free to roll the die and don't be afraid to fail a bit.
-This was the only game that forced me to roleplay, and I really felt like I was playing a tabletop rpg. Again max skills goading you was a nice concept, failiure sometimes opening aditional stuff is a typical dm workaround for player fuck up. It was really nice to see all that.
-Game really has an interesting setting and both the main and side characters are great. While I can't say the main character is a wizard, I think there are points where one can relate to him.
All in all an excellent game, the second planescape successor(first being mask of the betrayer, heavily underrated game)