Hi Tim
It is a pleasing looking image but I think I agree with Marc, Jase and Greg...hmm?..that was a cop out reply huh?
Ok, the only constructive feedback I can add is that to me it looks like you have used the shadow highlights feature in PS or a similar filter/action. After the minimum filter, shadow highlights is perhaps the most potentially destructive filter in PS...oh and deconvolution can be a real killer too in what ever program being used. Heavy handed use of the sliders in shadow highlights initially may look to show up faint stuff and suppress the bright stuff and while this may make one think oooh look how deep it is or wow there is detail in the faint outer reaches, it can easily and completely flatten the dynamic range in the image to unnatural levels and add plenty of noise.
If you didn't use shadow highlights or anything similar...ummm...just ignore me
...and I will just agree with the other guys
Mike