Cap, that depends on what do you like in Star Wars.

Do you like the pure OT most? -> movie novelizations, Han Solo trilogy, "Splinter in the Mind's Eye" etc.
Like bad-ass Jedi who are remotely related to Luke's grand-grand-grand-children? -> New Jedi Order etc.
Like bad aliens with soul-sucking ships? -> "Truce at Bakura" etc.
Like glowing-sword wielding bad-ass Sith Exxxar-Mofo-Kun, who lived 1000000 years ago before the Death Star was made? -> Jedi Academy Trilogy, Tales of the Jedi
Like starfighters battles? -> X-Wing series
...and so on.

In my very personal opinion it's difficult to find a good piece of EU. In my eyes even Thrawn trilogy wasn't perfect. You have to sieve through a load of bantha poodoo to find one pearl... which sometimes turns out to be written by a fan.

Originally posted by: Guy Caballero
Flip through the trade paperback collections at the bookstore, and if you like the art, maybe go for it.

I'd say that most of the covers suck - and looks all the same for me.