First off, kissing for me is everything! Second, dating over 40 sucks!
My last ex was THE worst kisser ever! There was little to no emotion in his kisses. It was very robotic and tight lipped. Yuck! I thought "well I could tell him and have him work on that" He got a little better over time, but even at the end, the kissing turned me off. The sex was never that great for me because the kissing was bad! I'm passionate and love to kiss and kissing is what gets me worked up sexually.
My current BF is such a great kisser, I'm constantly turned on my him because of that.
Could be the first kiss was just awkward and not timed well or maybe he is just a bad kisser. You may want to try again to see, but if he is a really bad kisser and you're into kissing, it probably will never be a passionate relationship.
You're either a great kisser or you're not!