Personally, I like the trench coat style. I find it incredibly sophisticated, which is an attractive quality to me. In my opinion the trench coat is only feminine, not masculine, in colors other than black or kahki, though black with silver buttons is more feminine. But looking at the picture, I believe you'll be fine. It's a lovely coat, and is definantly masculine.
I don't think there's anything wrong with it. My boyfriend has something similar and he looks great in it. I wouldn't worry too much about it looking feminine. A lot of guys wear trench coats nowadays.