Questions from a returner

is there a guide which explains potential and are there (gonna be there) some updates which will change something?

http://www.southperry.net/showthread.php?t=29712 ~ Potential & Enhancement System Guide by LiquidSwing
http://www.southperry.net/showthread.php?t=35651 ~ KMS Chaos Potential stats - we about to get it this summer/autumn (biggest change is all 121+ items give same potential stats as 71+ items atm)

hp wash before and after bb? are there any changes in the formulas, more hp or less? (db and warriors) i know there is no need to wash but i still like to have more hp so this is an important question

http://www.southperry.net/showthread.php?t=29963
Almost all class get a % hp boost skill now - a passive skill which increase ur hp (base + equip) for 10 or 20% at max lvl.
Post BB Min Mp calculator for all class here.
You can try search function in this forum for more result

MP reduction per AP reset:
Warriors: 4
Thieves and Bowmen: 12
Pirate: 16

HP increasement per AP added:
Beginners: 8
Warriors: 20
Mage: 6
Evan: 12
BattleMage: 20
Thieves and Bowmen: 16
Pirates: 18

^ Not sure 100% though

i played a pala and hero, tho idk which one to choose i liked both... since they all got boosts and nerfs here and there...so which one has the higher dps and is the bigger allrounder? or is going db the better option?

Here is Single target DPS calculator topic by Dusk. Check newest comments for lastest calculator. Keep in mind that is DPS on theory only.
I have never played a hero or db before so i cant recommend you which one better, but if you want my opinion, just play the class which u feel it fun