Not really, I don't exactly have a preference for anything so mecha anime get lumped into the group of s**t I normally enjoy
I like Code Geass, Eva, TTGL, Gundam 00, UC, ∀, Macross Frontier, Hoshi no Koe, Mai-Otome, GaoGaiGar, Bokurano, Escaflowne, Macross Zero, Heroic Age, RahXephon, Star Driver, Aquarion Evol is good so far although the some of the episodes are a bit silly, Rinne no Lagrange, I suppose Magic Knight Rayearth counts, Big O, and a few others