I feel shame to say that I still can't memorize its layout:(

It is like I go round and around and around in this place, falling in some holes, and eventually, purely by luck I manage to finish the quest.

Tomb of VARN and Castle Alamos give similar feelings. I miss these dungeons :))

Anyone else have their MM most favorite or most (un-)memorable dungeons?

MMVI has THAT place that is just a pain.

But I remember best two "dungeons" clearly: Titan's Stronghold and the Pit. I didn't try to clear them the first time. But in my second run through figured-out how to clear out the opposition.

THAT place, which is... Castle Darkmoor? :)

I am greatly looking toward it, but Silver Helm Outpost is next on the list currently.

Yep Darkmoor. Which is actually three dungeons of fun rolled into one.