Ed123 You definitvely have to check out the already mentioned
Seventh God. Without any doubt it's the pinnacle of Myth 2-single player mods. And I played them all (or at least tried them). Chimera feels a bit strange to me - not like a real game, a bit unfinished and not that interesting in mission design.
If you really intend to play Myth 3 I'd recommend you to have
a look at the Myth 3-remake which runs under Myth 2. It has been in beta for an eternity but it's still fully playable and very true to the original. And it looks and feels just so much better than the ugly and clunky polygons of the original game. That's the true Myth 3 for me. And with the
interface mod GUI and menus look and sound exactly like Myth 3.
Personally I don't like the HD-stuff for Myth 1 and 2 - exactly for the same reason you mentioned: It just doesn't look right with the animations.