Someone who cites spandex as a reason to like May probably
is focussing on her breasts.
But at least that guy was upfront about it. I don't think it's a big deal to like a character for shallow reasons. It only annoys me when people, I dunno, pretend to like May for character-based reasons when really they're just perving on her and don't want to admit it. Or they try to claim that she's the Bestest Shiniest Most Perfect Anime Girl Evah With The Amazingest Characterisation because she's soooooo popular! - when it's quite obvious that at least 1/3 of her fans are mainly in it for the fanservice. (Sorry, guys, but you know it's true.)