There are a few guys out there who ... well are prude's I guess ... they don't like bj's. But, each of us guys are different just like you gals! Ask for input from your partner, what he likes done etc...
I'm 39 years old and just experienced my first orgasm with a BJ. I've had many bj's over the years but have never been able to cum. What changed this time was my partner. There are definitely different techniques and she knows how. Special attention to the head by sucking hard and knawing with her lips over her teeth. Truly awsome!!!