I used to play it, but I don't anymore. My reasons for no longer playing it are several (as a disclaimer, I haven't played the game in about four months now, so some things might have changed a little bit, but I highly doubt the game has improved to any meaningful degree since then - largely because it's Sony that's running it >_>):
1) They upped the hardware requirements of the game to the point that no amount of ini tweaking or other performance tweaking could make it playable on my computer. I used to be able to play it on this computer just fine, but in each patch they kept increasing the requirements, until eventually my computer couldn't handle it. It's less about the graphical requirements, and merely about the sheer number of objects in any given area interacting (moving, shooting, etc) that my CPU is overburdened trying to calculate it all on its end, leaving me with massive lag and framerate problems. Obviously this is less of a problem for people with better computers, but for players on the low-spec end of things it matters.
2) The game was, and still probably is, massively unbalanced. The in-game technologies and weaponry overwhelmingly favor players in the Vanu faction; see this video as one example of just how broken their tanks are, for instance.
3) The population advantage on any given server at any given time of the day is almost never fair. One faction almost invariably has a HUGE population majority (and most often it's the Vanu, for obvious and depressing reasons), literally by a factor of 2 to 1. For instance, when I last played (on the Helios server) it'd be a very common occurance for someone in the TR or NC to log in and see that your population slice of the server is 25%, while the population slice of the Vanu is 50% or more. This population imbalance is even worse on the lesser-used continents, where you have a single faction overwhelmingly transfer in to the continent and proceed to sweep-conquer the entire thing just to get a resource advantage, then leave again, afterwhich a different faction does the exact same thing; this process repeats itself ad nauseam.
4) No sense of achievement or progress whatsoever. The entire game is a giant hamster wheel. You spend minutes/hours taking over a particular region only to lose it a few minutes/hours later and repeat the process over and over again ad nauseam. Even if you manage to fully "conquer" a continent, you quickly lose it again within minutes or less because there's no continent-locking as there was in the first Planetside.
5) Intentional Team-Killers. As if trolling in games wasn't bad enough, the team-killing that goes on in Planetside 2 is off the charts. Expect that if you accidentally injure or kill another player in your own faction at any time, or even if you somehow say or do something to annoy them somehow, that they can and will intentionally kill you - sometimes over and over again - simply because they can. I've even seen this done by entire outfits of a faction against single and multiple players of the same faction, and even against the players of an entire other outfit in that faction simply for being in that outfit. It was bad enough to the point that if someone didn't move out of the way of a tank column and ended up getting run over by your tank, suddenly it's your fault and you did it on purpose and now some butthurt douche is gonna follow you around and screw up the game for you just because they can't get over it.
I did have some fun in the game once I managed to get in an outfit that wasn't filled with squeaky-voiced little kids and/or arrogant trolls trying to wave their e-peens everywhere, and had some good times chatting with them on vent (because the in-game VoIP is awful) while we played, but the inherent problems of the game eventually became too much to deal with and invariably ended up ruining the fun for me.
You might enjoy the game, I suppose, but I certainly don't. If you have the time and bandwidth to spare you should just try it out for yourself and see what you think of it firsthand, as you'll get a better idea of it than what anyone can convey to you here in writing.