Well, I admire Green Day because of their music. I wouldn't be a fan if I didn't like the music, but I must admit I find Billie, Mike and Tré really attractive.
I think Mike was my first "celebrity crush", probably because he is the one I could (and can) relate the most.
I have never been in a GD show, they only came twice here in Brazil (1998/2010) and I couldn't go on both shows, but probably I'd fangirl really hard if they come again, I mean, REALLY hard.
Anyway, when I was 12-13 I had a computer file containing 700+ Green Day pictures, I used to watch BIAB religiously at least every week, I wrote lyrics all over my english test, etc.
My passion only grew stronger, I still listen to them every day as I used to do and I always get this kind of butterflies in my stomach when they post on Instagram or when I see things related to them, it's something I can't control.