Secret babies – unless the father’s a serial killer, there’s no excuse to hide a child from the father. It can be done in other ways (if it’s not the hero’s child, and there’s a good historical era-based reason for it), but generally I hate it. However, I’ve seen some editors calling for submissions with that theme recently. :/
As for hero types, I’m fine with most things. I am just tired of everyone always jumping on the bandwagon. Zombies, however – what is that all about?!