I haven't owned a pair of men's jeans in 10 years. I mix in other pieces whenever I can and feel like it. I recently told a friend I was a crossdresser, he was supportive but said he was a bit surprised because he thought I was the manliest guy he knew! I guess I can't be too obvious or strange looking when I mix it up!
Other things that mix well are some jackets, not too flared dress pants, knee length fitted shorts, tunics (my fav to mix) and casual bags. I have a purse that is made out of army surplus materials. It's pretty cute as a purse, but military and rugged enough looking to pass for a "man-bag".