Hello Jon,
Nice image!
I like globulars too - and you can generally get good results with shorter exposure times than galaxies. I do prefer images of galaxies but I don't have the clear skies and set-up for the longer exposures that most of them need to do them justice. Also globulars don't have the colour and beauty of nebulae.
The main negative with globulars is they do tend to be a bit "seen one seen them all" - but visually (in my telescope) they are my favorites. I nearly always have a look at ngc104, 5139 or 6752 and I always find them amazing.
Here is link to someone who has imaged nearly all of the GCs in the milky way. It is a good resource to choose globulars to image.
http://my.hwy.com.au/sjquirk/globs-ra.html
Regards,
Tony.