Not painfully bland, but still pretty personality-less (and I say that as a huge YA fan). Hulkling and Wiccan get the brunt of it, imo, with Speed and Patriot having the most character, and the rest being somewhere in the middle.
Of course, fanon has pretty much come to an agreement as to what their characters should be like, so we can basically ignore the actual blah on the page, project our ideas onto the characters, and still complain when they're being "OOC" ;)