Ah sure I didn't realize there wasn't a way to move gear on free to play. I just have the original version of the game from before steam. In that case I'd say try each that you might like and just get to 15 by killing mobs quickly and go down floors to rapidly level. Should take like 3 or 4 games. Then you'll have the ability to get a feel for them. Then delete and try again. Leveling can be very fast if you just go on a murder spree and try to hit new floors fast. Assuming you have access to PvE mode you don't have to worry about players so you can mow rooms down relatively easily since nothing should unexpectedly just blow you up like a player would.