I wanted to say "Not that special for me personally. But probably a big deal for others", but then I thought more into it and decided they were just flat out over rated, and this is why.
Usually a first kiss happens rather early in life, right when you're just getting into relationships, so you're almost guaranteed to spend it on someone you only feel "meh" about. And if you're someone who didn't get their kiss till later in life (say, mid-20's) you got one of two things going on.
1. The person just doesn't tend to get into relationships easily, so it wasn't exactly that high a priority they cared about anyways.
2. They were heavily censored growing up by a puritan family. So the huge "moment" is less of a legit moment, and more a symptom of someone finally being exposed to sexual urges and going nuts... And honestly if you've censored your child enough to force them into this state, this is more an indicator of poor parenting than the kiss itself meaning anything.
2b. That or you were in an online/long distance relationship, and this kiss was your first form of physical contact via just meeting up. This isn't quite the same thing as censorship, but similar because the rush likely has less to do with the individual you're kissing, and more how long you were effectively forced to go without it.