BJ Tips and Techniques

For a while I've been adverse to giving blow jobs for to my ex but now that I'm in a better relationship, I'm trying to spice things up a bit. We've been going vanilla for so long and it's killing me so I finally got him to admit that he loves blow jobs.

Gave him one but he didn't have quite the reaction I wanted. I want my guy to quiver and moan, so I need help. Anyone got ideas?