Macross is what got me into anime, so naturally I would love giant robots (and by extension, in the eternal war of Real Robots vs Super Robots, I'm in the Real Robot side).
That said, what really interests me is not mecha itself, but that at least an element of romance is usually associated with mecha nowdays, unlike other mainstream action anime where it's usually non-existent. Yes, it's a view that's another by-product of Macross being my first anime, but seems to hold up rather well just by skimming through mecha shows of the past 5 years, so I ain't complaining. XD
(And that's not going into me thinking mecha anime has a higher proportion of childhood friend LIs than other shows, but that's just my gut feeling talking, since I haven't tabulated any sort of numbers yet.
)