I totally agree, Jak's my main and he really does have a move for every situation hes in. Once you get him down he can definitely be an unstoppable force, his level 1 is pretty good and his level 3 is awesome. I wish his level 2 had toro's blast radius but until it does I never use it cause it's so avoidable. I barely see any Jak's online which makes maining him even more fun
ABE and CHIMERA FOR PSASBR
My 2v2 partner plays Jak (who is a 110 BP Blackbelt 2v2). He tells me that Jak is all about being unpredictable and using tricks and gimmicks to his advantage. Just remember that his Square attacks (melee attacks) are pretty risky to use while on the ground (though be sure to make use of his mobility options such as air forward square, air down square, and air up square). Jak's Forward triangle is really good and his down circle is amazing. With Jak's down circle you can change directions while in the air, cancel out the attack while on the ground, or let it charge up for an unblockable attack. Don't neglect his forward circle either.
December 13th 2012: Went 8-0 Stock Unranked FFA. (Jak)
January 10th 2013: Sniped Asis_aka_talent into Jak's lvl 1. (Uncle Radec)
April 16th 2013: Caught parappa's lvl 2 with Sweet Tooth's lvl 1 and didn't die in the process (Sweet Tooth)
May 5th 2013: Got my Radec eviscerated by whaatxddd's radec in 1v1. Kmart, u better watch out.
Just learnt "Drake" and is now learning "Nariko".