P1999 is alright, but it has some significant issues. It's fun for a lot of people, kudos to the team that runs it, and I won't bore you with some of the reasons why I don't play on P1999, but P1999 isn't for me.
Had fun on EZServer for a bit, until I found out about the RoA and what you have to do to progress later on. If you thought live EverQuest was a timesink, imagine being required to level up to 70... ONE HUNDRED TIMES (as well as do things like levelling every tradeskill to 300) in order to "power up" a ring (think it has like 10,000 HP and +500 tick regen at its max level) that's basically necessary for late and endgame.
Some claim that with ideal multiboxing setups and no competition they can get someone from 1-70 in under an hour, but you're still talking about ~100 hours. Per character. Under ideal circumstances. With PLing. Just for one requisite quest to get your ring boosted. And that's just one of the timesinks they put in. I won't even mention the barrel / chest quest.
Currently playing on TheHiddenForest and having a **** of a good time. Basically a huge revamp of EverQuest, ranging from total zone overhauls, to a new storyline, to MANY new quests, to custom loot. Retuned spells (pets are upgraded, for one thing), etc. I could go on and on about why I like the server, but it's by far my favorite of the emu servers. Lots of guilds, big community (not as big as P1999 of course), basically a great place. Imo it's sort of what a lot of people wanted EverQuest 2 to actually be. It's hardly perfect, but THF is by far the best emu server imo. People help each other out all the time, and there's everything from solo to group to raid content.
Also, imagine my surprise when at level 20 my group ran into new named mobs in Crushbone (already populated with new mobs) that Enrage, Flurry, etc. It's definitely good times.