Here are some cakes I've done in the past for the men in my life:
For Golf Lovers - chocolate ganache icing, graham cracker crumbs for the sand, and piped on green butter cream icing for grass. Flags are star bursts/flavored tootsie rolls on tooth picks.
For the pool table gamer and connoisseur in your life:
For the preppy guy in your life (aka my husband) who enjoys being trendy and chic. I loved this argyle design cake. It was fun to make and tasty too!