Didn’t feel like much of anything. I was in college and nothing changed.
I grew up legal in clubs at age 18, and had been going out dancing with a fake ID since age 16. I didn’t drink, so I didn’t care about drinking. Turning 18 I went out and used my ID for the first time and the bouncer who knew me just shook his head when I told him it’s my birthday.
In college I transferred to a 21 drinking age state (I was a Sophomore and 19 when I transferred) but you could get in the bars if you were 18. I didn’t drink so that part didn’t matter, I just wanted to go out dancing, and I made sure I’d be able to before applying to the school.
I don’t even remember what I did on my 21st birthday. I guess I went out? Not sure.