Oh heck, speaking as someone who loves Hal and loves Johns' work on GL, his Hal is seriously lacking. His Hal Jordan is one of my least favorite aspects of his GLC mythos, which is a bittersweet thing to admit.
Ultimately, people like what they like, so Hal may never be interesting to you. But damn if I'm not gonna try! Here're some highlights I found on the "Hal Jordan" tag:
It really does appreciate the unexplored aspect of Hal as not being all that bright, but lovably and heroicly so. Another aspect of that, done in a less comedic way, is his stuff with Ollie, where Hal is a tool of the establishment and Ollie is... well, Ollie. The GL/GA stuff is incredibly heavy-handed, but there was some surprising character depth to be found for both characters. I myself had no really understood this until I read this post a couple weeks ago:
The comments make some fascinating observations about both characters, particularly how Hal is actually the true liberal of the pair, and why his handling of Roy's addiction was the best thing he knew he could have done.
Plus, he can actually be pretty hardcore even without the ring!
That's from FLASH/GL, which is the series that really made me go, "Man, THAT'S the character I want to see returned from the dead and redeemed, because he is just too much fun!" Sadly, Johns has other ideas. But at least he's still around, and hopefully other writers will finally tap into those aspects.