Joining RBF in like 2011(?), finally being initiated and climbing up the ranks was an amazing experience because they had a great group of serious players.
Starting the BGD gang with some ls-rp friends and making it prominent.
I remember joining GBZ because there was fuss around it for being hyper heavy RP. I loved it but the faction died. Later I revived the faction and continued it's legacy as the leader, but due to real life duties didn't have time to play anymore and it died. It was also when I completely left SAMP.
All of the huge gang brawls were such fun.
Becoming a tester and seeing the other side of the application forms.
Too many good memories to name...
EDIT: I remember installing snow mods around Christmas and it felt amazing roleplaying that it was Christmas time, but there was a discussion whether snow was realistic in LS-RP.