FE has been a weird experience for me. I've been unable to get interested in a MMO since WAR crashed and burned. I've spent some time in AION beta, but it seemed way too linear and I didn't like the feel of the game. I didn't get to buy my copy of Darkfall which turned out to be a good thing. I even gave a re-trial week to WAR, AoC, LotR and Vanguard, but nothing caught my interest.
FE was barely on my radar, but I couldn't pass up the open beta. At first, I thought it looked horrible and the combat seemed awkward, but I kept logging back in. I'm a sucker for huge open worlds and non-linear gameplay, both of which FE has in spades. If you're an explorer/tinkerer type of player, FE will suck you in. The steep learning curve in the game seems to filter the player-base in a positive direction. Not nearly as many people shouting about "Go back to WoW!" etc.
I would give the game a try and not just for a couple of hours, but two or three days to get a feel for the depth that is there. I'm not sold that it will be my next MMO, but it's looking more likely that I will play it on release. This game has real potential.