I'm kinda of the opinion it sorta depends on your kissing preference and who does it.
My first one ever was admittedly memorable but more for the emotional bullshit that accompanied it than anything else. I had worked myself up really badly about telling my then-crush that I liked him - since at the time I was bare months switched from an all-girls' school to a mixed and had no idea how to boys - and sorta just burst into tears in the corridor when talking to him. Instead of patting or hugging or just straight up ignoring it like I was used to he went straight for a kiss. I just remember it being quite wet and just being totally baffled as to why he was doing it. It stopped me crying, mind.
I've had first kisses with various boyfriends that were really not that memorable because there was a lot of affection being stuffed into a very short timespan. Long-distance, just small blocks of anything from a few nights to a fortnight or so of time together. They melted in with the other affection exchanged and the high of meeting, I suppose.
There is one other that sticks out, though. First kiss from the start of the third relationship. I went Halloween lazerquesting with a bunch of friends and met a new guy there. We kinda spent most of the run up to the lazerquesting - brief stop in the pub for everyone to meet, dinner at pizzeria with group, train to the location - flirting awkwardly, and then when we were inside he just kinda cornered me in the dark at one point. I guess it was pretty impulsive and woulda been a bit early for most people's tastes most likely, but definitely enjoyed it.
Practice probably makes better, yeah, but those stick out more than anything that happened with practice.