A lot of people think the 7th game is the best. I must say that I absolutely disagree, although it may be hard to argue why. Probably because 6 was one of the first games I ever played, and I played 7 at a much later date, many years later. So I get a pure nostalgia trip, when I venture into the lands of Enroth in the 6th installment. Such feelings just aren't connected to the two other games in the same way. With that said I will try and be as objective as I can. Apart from all that I really do think that the 6th game excels at multiple areas. It was just all together a much more solid game.
First of all M&M6-8 all share the same engine and so have the same over all feeling about them. But this already makes the 7th and 8th much more outdated., 6 being released in 1998 while 7 and 8 in 1999 and 2000, respectively.
In 6 you start off in a small town called New Sorpigal. Your hometown of Sweetwater has been destroyed by Kreegans (devils), and you were brought to safety and trained by Falagar. This is a fine beginning to a game, you start off low and work your way up. In 7 however you simply win a scavenger hunt and so become the lords of Harmondale. You then spend a lot of time just trying to fix the castle etc., and I just don't really like the idea.
You can only pick human characters in 6, while you can pick human, dwarf, goblin and elf in 7. Although almost identical the skills are a bit more advanced in 7. In 6 all the classes can master all the skills they can learn, while in 7 you are much more limited in that sense. I don't know if this is a good or bad thing, it certainly offers more diversity in the team, but I think 6 characters are flawless. Small things as the voice acting is much better in 6 than 7 as well.
I think the overall plot is better in 6 than in 7, and the quests are much more thought through.
The maps WAY better in 6. Both indoor and outdoor, 7 and 8 stand no chance on this area. In 6 if you put all the maps (15) together they are really connected in every way and make out one large map. It's just such a dynamic world. There are huge puzzling dungeons and temples in 6, which really take a long time to figure out and beat, such as the Tomb of VARN and Castle Darkmoor. In 7 and 8 there I don't think there is a single really large dungeon.
Lol I could probably go on, but you get the point.

NILBOG