I don't make girly quilts for anyone, I simply don't like girly styles. Most of my quilts are pretty much unisex, and the main difference you notice (though again, not always) is that the baby quilts are brighter and may include animal motifs. I'm trying to train myself to work with pink, small amounts of that are going in the odd quilt, but again, you can get pink into a quilt for a man without it looking girly if you get the overall colour scheme right. I made
http://www.flickr.com/photos/elettaria/5553391059/ for a friend of mine and he loves it! I'm planning to use that sort of colour scheme and make something similar to
http://www.flickr.com/photos/elettaria/4130920292/ for my best friend as a sofa quilt, and I know that he is likely to get a red or terracotta sofa since I know his tastes.
So I don't think of myself as limited when it comes to designing quilts for men or boys. I do avoid a huge amount of commercial quilting fabrics, traditional florals for instance, but there are so many styles of fabric around these days that I am still utterly spoilt for choice.