My crpg adventure started with Black Isle Studios and my first seriously played crpg was Fallout, as far as I remember. Later I was playing also some older titles (I suppose Krondor and Ishar series being the most hard-core I played in childhood), however I've never managed to complete them. I remember making some notes and maps, it was fascinating and I agree that it brings a new level of fun, but it does not work like that if you have to spend hundreds of hours on drawing every single point.
In some games (e.g. Ultima) poor graphics makes impossible to get any sense of direction. I liked the feeling when you go into the dungeons, looking behind fifth, sixth, seventh corner and feeling that at some point you just need to turn around, because one more step and you'll not be able to find the way back. In such case you just need to draw full map of every single square to navigate and it would take years to finish any title with my current time resources. That's the reason I suppose some titles are unplayable today. Not because they're not fun anymore, but becasue players and world have changed and we just cannot invest enough time and focus into old-school crpg adventures...
But M&M1 - I played M&M6 a lot, loved it for the atmosphere and I'm going to play the whole series definitely. I expect to die a lot in M&M1, but with a proper attitude dying is also fun in such games, it's just how some adventures end, isn't it? ;)