Hey povuholo, I have some suggestions you might want to check out. First off are two creature addon mods from abot.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=258 adds various under water life to the waters in Morrowind, making them come much more alive. Very nice when used in conjunction with MGE's beautiful water and makes swimming under water fun.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=7636&id=2786 another Abot mod that adds a birds to the world of Morrowind. Again, in my opinion this is a required mod for my game and I recommend checking it out if you haven't, it adds a lot to the atmosphere.
I need to try Water Life (Piratelord's Creatures adds some stuff too though) but I've used Birds, which is pretty good. Only the bats were really annoying, but I think he tweaked those somewhat in the latest version... I should give it another try.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=5722 is a mod that does what it sounds like, it replaces the default missing mesh error marker with something a little nicer to look at.
Ah yes, Todd Howard's head.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=5988 replaces Creeper with a unique version. You can choose from a purist version or versions that add more gold.
I've never tried this one (Hadn't heard of it, but I also never visit Creeper) but it looks good.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=5706 is a nice compass replacer (replaces the compass arrow)
Using this myself too, I forgot about it.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=7899 - similar to the Oblivion mod of the same name, this mod adds regional music and greatly enhances the games music system. Includes a number of custom tracks and also the option to use the original game music as well. I love it and can't imagine playing the game without it.
I still need to try the latest version, the last one I used had some issues.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=7651 is a great weather enhancing mod that makes it so that there are changing weather patterns in the game. Should be compatible with everything on your list.
Tried it, but sometimes the colour of the sky would change a few seconds as I went outside (the mod changing it I guess) and it got a little annoying.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=6639 makes non-combatant NPC's flee from you when you're in combat.
I'll check it out.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=7238- hit space to de-nock an arrow if you find you've prepared one and you don't need it. Simple but useful.
I requested this mod! I'll add it.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=5768 makes it so that hand to hand combat actually does damage.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=5766 - a number of nice tweaks to the game, some of which prevent cheating which could unbalance the game.
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=6708 - adds four new creatures to the leveled lists,
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=6726 adds four more creatures to the leveled lists.
I'll have a look.
Also, you mentioned Graphic Herbalism, which is an awesome mod. You might want to also include a link to http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=7211 which adds Graphic Herbalism support to Tamriel Rebuilt.
Another one I forgot to add, thanks.