Maximum hype. I did not enjoy 5 and wasted a lot of money on it; I think largely because of nostalgia stages like Cammy's SF2 stage [which is still better in sf2].
SF6 has a great looking roster with great looking new characters. The art style is tighter than 6 as well.
I play a lot of online, more so than SP, and I am a pretty good player, but I hope the single player offerings are fun as well!
I also want to say I hate how SF6, Tekken, MK will all likely come out in the same year. I wish they were spaced out more.