JAZZ! damn hard! i learnt eugienes trick bag (the solo the karate kid (cant remeber his name)uses to win the guitar duel in crossroads) an i think its quite easy compared to some of the jazz stuff my teacher has been teachin me! you have to use your hands in a completly different way to when your normally playin as you have to play bass, chords and melody together, an the chords ae usually pretty damn difficult to get the hang of. yes its considered cheesy but jaz is probaly the hardest kinda music cos it goes any where and every where! an as for lookin at your weakest skill thats a great idea as if you can over come that then you can move on and be a far better guitarist then you were. mine was syncopation (playin off the beat) i used to find it hard to detache myself from what the drummer was playin and play off the beat but i got the hang of it in the end.