XDragoon is a quite shounen cliché comic, but, unlike many shounen wannabe, it actually has pretty good artwork, plot and storytelling. Written, drawn and colored by Felipe Marcantonio, it's been ongoing slowly but steadily since 2008, with 12 issues so far (one complete story arc).
I'd recommend it to shounen fans. It gets pretty good once you get past the first chapter's unbearable cliché and hideous translation. Oh, filesize is quite large.
P.S.: The cassarian mistery remains: Why do female dragons have boobs?