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liked - War Fanatics, Arctic Snipers, Santa Gremlins, Sylvan Centaurs, Zmey Gorynych.
neutral - metamorphs, werewolves, fires, nightmares, hardened snipers. it's just scary to fight them, but I see no point in carrying them with me. it' same rarely possible to form a strike stack from them.
negative - Sorceress (either stolen from HotA, or HotA stole the idea from Voga - unclear). all recolored golems (except for the metamorph with the script enabled) - they are the same golems, just bulkier and you need to cast slow; they are cured by two or three good stacks of shooters level 3 and above. all emissaries - useful only if you manage to predict the date of the finale and keep them in the army for the required time for maximum effect. keep them in the army less - you lose a slot for another strike stack at a lower cost. keep them in the army longer - you risk dropping the parameter to 0 (sometimes the game crashes along with it due to a script error). meanwhile, the knowledge emissary is useless in principle.
dracolichs - imbalanced, there's no point even discussing them.