Was initially on lemmy.zip because it seemed really chill and that was such a cool instance name. I had no problems with it whatsoever but I realised it didn't block out certain instances that I disliked (aka lemmygrad). Now I'm on lemmy.fmhy.ml and I'm loving it so far since it had everything I needed:
Blocks out lemmygrad
Allows talk on piracy and NSFW content
Loads better compared to the more overpopulated instances
Wasn't very restrictive and was very welcoming (didn't even ask me for a reason for joining)