I very much enjoyed his Star Trek renewal, and am looking forward to the sequel.
I'm not overly concerned about the new Star Wars films because even if they're absolutely stuffty, it doesn't change how good the previous ones were.
But, I like Abrams, I like the spirit he puts into making his films, and I do think he could give it some justice.
I'm more interested in what plot they shall follow, if it's one based off of stories already laid down by the comic books and the many other media portrayals of the Star Wars Universe, or not.
And although I said I don't really care if they do it bad, since it won't reflect poorly on previous films, I do hope they try to avoid including old characters. Obviously the actors from the Original Trilogy are way too old now. Some you can do, sure, like Chewie, R2-D2 and C-3PO, but I'd hate to see them bring in new actors to try and play old, very familiar, characters, and end up not looking anything like them or acting at all like them.
I'm imagining Maria Bello replacing Rachel Weisz in The Mummy: Tomb of the Dragon Emperor.
Which was a stuff film and crappy sequel to the previous two brilliant films, but she didn't help with her poor acting.