Strike Witches gets hated for moderate fanservice, where as I haven't seen any such complaints for Ladies Vs. Butlers, KIssxSis, High School of the dead, and others.
@jointron33: You've been living under a rock if you haven't heard complaints about fanservice in High School of the Dead. Kiss x Sis is absolute drivel so nobody brings up for good or bad. Never seen the others. Tons of shows catch hell for fanservice. You're probably new to anime fandom if you think Strike Witches is the only one.