1- I personally got no problem with them.
2- Maybe will be a shocker, but men don't care about what shoes you are wearing, the only thing that matter is: does it have high heels or not ? (end of the story) (if anyone disagree with me please comment because I am sure of that one).
3- Style and fashion will depends on where you are and who you hang out with, from the little I know, UGGs are more expensive as other similar shoes, they have tried to develop a special brand image of quality, and it was quite successful a few years back ( there is even a reference to them in an episode of Entourage).
Now here is a note to think about: Some people found CROCS cool... I mean for heaven's sake those thing are useful but they are not cool.
If you like them, wear them, if you think they match your outfit, own that look and it will be good.
I hope it helps ^^.