I love me a good dungeon crawler, but somehow I missed these games when they were released. So if you could only play one of them which one would it be?
6 is my favorite, and it comes in a pack with the first 5 games. M&M 7 and 8 are both similar to 6 and still fun, but they're not as good as 6.
EddieA's right. I'm playing M&M 7 on my netbook right now. Its gameplay has some improvements over 6 and it's definitely a fun game, but I still like 6 better. Maybe 6 seemed more cohesive than 7 does, or maybe I'm biased because I bought 6 on release day back in 1998 and enjoyed it immensely (and am about to rebuy it for my son--curse you, GOG).