If you go into GGXX with the mindset that the Capcom approach to 2D is definitive and find yourself freaking every time an old favorite SF or Versus tactic fails, you'll probably get pissed at GGXX. GGXX REQUIRES pure aggression and punishes people who block more than attack, so if your gameplay style revolves around turtling or FB/DP antics, GGXX will spank your ass.
However, that doesn't stop it from being a brilliantly-designed, intuitive, deep game. Spend the time to learn how to manage Tension, how to RC, when to use Burst, and the incredibly varied intricate and unique styles of most of the characters.
And if you just can't get over Capcom play, there's always Sol/Ky.
Get it. It's currently my favorite 2D fighter, trumping even the inestimable 3rd Strike, plus it just looks SO. DAMN. GOOD.