Morrowind Comes Alive has a distinguished history, and works well, but there have been two consistent complaints over the years. First, that it's almost impossible to move around in taverns when several MCA NPCs spawn there. Second, that the mod includes a range of assassins and other, similar types who will hunt only your character, often have enchanted weapons, and gen many levels higher than you. I gave up using it myself around the third time through, when a bandit killed my character right after getting out of the chargen. :whistling: But that was an older version, 5.x, and I can't say how 6.x deals with any of this.
Another mod to consider is Starfire's NPC Additions. It's similar to MCA but no spawned NPCs attack the player; each NPC is named; and the spawns are equitably distributed while avoiding the "rush-points" that MCA had (and may no longer).
I've just started using Starfire's mod and I do quite like it, but some of the NPCs do attack (not very many). My only other complaints are that:
- Sometimes the towns can get a little laggy, as with any mod that adds creatures / NPCs to towns, because I think they keep spawning but don't go away.
- The dialogue is so generic that I think I'd prefer it if it was impossible to initiate dialogue with the new NPCs, that way they'd be purely decorative and I wouldn't be put off talking to people for fear of them being just another generic NPC.
Also, if you're thinking of getting Morrowind Comes Alive I'd recommend looking out for (unofficial) patches, as I believe there are quite a few that may improve some aspects of the mod. Also MCA Names gives the new NPCs actual names instead of "Commoner", etc.