Gundam holds the 2nd spot because...I'm a mecha fan only because of Gundams in general. Its not like I buy models for it or anything, I don't think I quite understand my fascination with this type of mecha.
i love a lot of the older Gundam. i find it very hard to get into a lot of the new "flashy" gundam. i did enjoy the first season of SEED because it harkened back a lot to the principles of the original gundam. my fav Gundam is almost always UC and involves the original series, 0083, Zeta, and F91.
since you enjoy Gundam, check out Souko no Strain. it's licensed by FUNi and i loved it. it's 13 episodes long and one of the best mecha human drama series i have seen in a long time.
http://funimation.com/strain/Wolf's Rain, was awsome, with a sad ending, untill the VERY end, which was a little disappointing.
the very end of Wolf's Rain brings the story full circle. the OP song and animation was very well thought out, and both begins and ends the anime, which in turn, creates a new beginning for Kiba-tachi. after all, what is paradise truly but a chance to start all over again and have a new opportunity to live.
I do seem to like the works from Studio Bones a good bit, as evidenced to numbers 3, 5, and 6.
studio bones does a lot of really well written, produced, and animated anime. sunrise also tends to put out a lot of anime i enjoy. my list is rather long so i kind of stopped counting a while ago and started partitioning out my soul to various companies, producers, and seiyuu.