Ignore the troll. I never see a good word out of that person and really have no idea why they're here if they hate it so much, except to be a troll.
GF is a very fun game, IMO. I've been playing for over a year now and have three different characters: a Demonologist (lvl 73), Sage (lvl 61) and Cleric (lvl 44). There are a lot of costumes available to change your characters looks, so you can go wild with that. ^^ As far as leveling, you can either go solo or group, whichever is your preference. Solo you get more experience per mob, but in a group you'll kill faster, so it evens out. Especially for the demon hunter quests, as Tsuki mentioned.
If you want to see a little of how the game looks, I have a "photo album" that I've been making with my newest character here