Verrrry nice Mike!
My favorite is the "main nebula" crop - perfect framing and you've processed the detail & colour nicely. Yeah, I like & appreciate the Ha but with me it's always going to be a case of
show me the colour!! 
Is the Lobster a "boring" subject? Well, when I imaged the Running Chicken I thought it was going to be monotone and boring but with some processing effort it turned out anything but. I now think
any subject, properly processed and framed to highlight its particluar nuances will be quite striking and the Lobster you've done here is no exception. Good one!
Cheers, Marcus