Outside of the Infinities series and the Mara Jade/Emperor's Hand comics, I haven't actually read any Legends comics.
I know there hundreds of them, but are there any suggestions? I'm going to start Dark Empire.
Never read
Dark Empire, but I've heard good things about it. To get the full story, you do have to read the sequel comics miniseries,
Dark Empire II and
Empire's End. As I understand it, those are not so good, sad to say.
I'm a
huge fan of the
Knight Errant comics. The whole series is collected into three trade paperbacks,
Aflame,
Deluge, and
Escape (in that order). There's also a novel, just called "
Knight Errant" that is set between
Aflame and
Deluge that you should read for the full story.
If you like Ewoks, the
Ewoks: Shadows of Endor digest is a fun little prequel story that acts a bit like a finale for the old
Ewoks cartoon, while bridging the gap between it, the Ewok TV movies and ROTJ. (It avoids the silly aspects of the cartoon, while remaining something you can share with your children or young relatives.)
If you liked the Genndy Tartakovsky
Clone Wars micro series, Dark Horse also did ten digest books based on that art and story style,
Star Wars: Clone Wars Adventures. I thought they were decent, which is saying something, since I don't like the Tartakovsky cartoon it was based on.
Star Wars Tales was also really cool; It was an anthology series that had various short stories, from serious to funny, to parody. Some were meant to be canon within Legends, others were just "for the fun of it."
Visonaries was a fun trade paperback. Like
Tales, it was an anthology of short stories set in various time periods. There was more emphasis on the art (it was produced by concept artists from ROTS who were given free reign to write and illustrate whatever they wanted). Some stories are canon, others may not be. It is worth reading if nothing else for the non-canon "Old Wounds" story that was a heavy inspiration for Maul's roles in
The Clone Wars and
Rebels.
I've only seen bits and pieces of them, but the Infinities of ANH, ESB, and ROTJ were pretty interesting. They imagined what could've happened had a pivotal moment in each movie gone differently (they're not sequels to each other, so each one assumes that the previous movies happened as they did onscreen).