MM9 raised some very strong feelings. Even those who liked it (of which I am one) have to admit that it was a very buggy game, which was rushed out before it was properly finished. IMO, it could have been the best M&M yet, the potential was certainly there. But it really did need the rough edges smoothing off, and this was never done. Bones and a few others did their best, but it really needed some changes in the actual game engine which were beyond anyone without access to the game engine source files.Having said that, I still liked it. The humour is still there - try reading the scrolls and notices posted up in various places. And it has what I rate to be the best combat A.I. I've ever come across. There's a dungeon in there called Chasm of the Dead, which I managed to complete with a level 11 party of 2 fighters and 2 magic users, and which still gave a level 33 party an enjoyable contest. And all this without artificially raising the abilities of monsters as your party's prowess increases - which I have always considered a swindle.
All I can say is: Be open-minded when and if you give it a try. You may not like it, but as I say, I enjoyed it.