I usually dress up my female base to look like a male. Sometimes I make feminine/female avatars, but for the most part my avatar is a male character. I use the female base simply because I think Minion's personality fits better with the slightly rounder face/body and the less obvious shoulders. I think it makes him look a little chubbier. lol
The kind of avatar that I generally strive to make will look VERY similar/exactly the same no matter what base you use. Like, with my normal avatar:
There are small differences, but it's not all too noticeable! (Besides the bite of manfist that's taken out of the one on the right)
And, yeah. Bodymods definitely make that a ton easier.
And I've never gotten flack from anyone for using the female base... but that might be because people generally don't even notice.
Everyone tends to confuse the sex of my avatar as I have been called 'Sir' more than the opposite. I happen to have a female avatar.
I don't particularly blame them, I guess the breasts on this top are not as noticeable, nor is the avatar itself extremely womanly.
I will admit I have seen some of my guy friends with guy avatars dress their avi's in extremely sexual creations (sometimes femme, sometimes just 'damn I'm sexy') and I always am like 'man I wish I had thought of making something sexy like that.' But then when I go onto tektek and try, I am always disappointed because it doesn't fit the persona of my avatar (I guess she has a personality of her own, now!)
I'm always trying to come up with good cross-dressing ideas, I enjoy the challenge of trying to make my male avatar look female.
If I really like it I'll submit it to the arenas and keep it in my outfits. : )