Gyuri. Gyul's personality is simply jjang. Its 2011 and its been proven by reality shows (SECRET) that NO GIRL GROUP MEMBER can WIN AGAINST OUR GYUL!
But i'd also like Nicole!!!
Nicole's 16D personality + American-ish living style would be a change to what WGM has previously offered + her social network is huge so we'll see who'll get jealous and whatnot.