Just as long as they don't over-do it and give us "Star Wars Stories" just to make another billion dollars. As long as there is an actual tale to tell, then I'm good with it. Finding out how Leia got those plans is a story I'd like to hear. How Han and Chewie met and got the Falcon? Another story I'd like to see. So I think they're off to a good start. The much rumored Boba Fett and Yoda movies would also be good as they're both popular characters without a lot of (now) cannon backstory. I think a Vader in his prime hunting down Jedi would be another good one to throw out there. And now with that Sebastian Stan Luke photo, I'd like to see a Luke movie between 6 and 7 (perhaps with both him and Hammill sharing the role over the course of the movie?). TFA left a LOT of questions for us to learn about and I'm not sure we'd get them all answered in 8 and 9, so a Star Wars Story there could really bridge the gap and tie up any loose ends left by 8 and 9.
I just don't want them resorting to Lost flashbacks where we take a whole movie to find out how Jabba got his tattoo. As long as there is something worthwhile to the story, then bring them on!