I've gotten this sometimes with my own work!
Art is a matter of taste. I've taken interest in drawing in manga style since the mid-to-late 80s before appreciating other styles. Nowadays, I draw American cartoon/pop art style (Bruce Timm, Stephen Silver, Darwyn Cooke, Faruk Cemalovic, etc.), with tinges of manga (Gou Nagai or Jirou Kuwata influenced). Hell, I just find cartoon styles more fun and appealing to work with!
Most of the time, the best criticism I've gotten is that my characters look stiff. That I can accept, and am trying very hard to improve on my art dynamics. But I get a bit annoyed when I'm told that my drawing style doesn't look "realistic" enough. I've grown tired of this "absolute realism" bullshit. (Some use "realism" as an excuse to be "hard-edged".) But sometimes (and more recently), I've even gotten "if it's not totally manga-influenced, it sucks." That really pisses me off. (Just like the "if it's not from Japan, it sucks" stance many people have taken these days.)
Some people just can't see the forest for the trees.