languages was possibly the most disappointing aspect when i did manage to get orcish into the 60's to find out it only rarely stopped orcs from attacking, and had no bearing with orsinium. after that, i never bothered with any other language again.
there's a few providences i've never stepped foot in.
i've never tried getting to the crux swimming from the boats. though i wish i did.
never did the high elf/paralysis exploit, even then i knew that was cheap and just cheese. actually never took advantage of any of the exploits of the character generation.
i never used health regeneration as an ability.
never did care enough to unravel all the mysteries of a dungeon. i hated the brick door teleporters.