Your favorite and least favorite monsters in Heroes.

I don't like the appearance of many Orcs, Manticores, and all the alt-grey Demons (I hate grey, plus they emit smoke instead of fire, which isn't very appealing), Peasants (they should drink less beer), and the Emerald Dragon, the only unit that looks better in its un-upgraded form. And, of course, I don't like Undead, except for Dragons, but they can't look any different – it's a stylistic choice.
I love (because of their appearance): all Dragons, including simple Wyverns and excluding Emerald Dragons, creatures with female models, Paladins, Nightmares, and Unicorns, Titans, and Griffins. When evaluating a monster, I somehow look at its appearance first, and only then at its abilities. That's just my habit:D