Several things I like and several I don't
About whats available:
WHMCS: I don't like subscription software. Seems to be getting better. Don't like the 3rd party implementation of modules. I prefer the company that created the software to Build Functionality.
ClientExec :Simple to use, Good implementation of plugins, Admin area is awful. Slow development. Hard to build products. No 3rd party development (good). No real Forum. Slack doesn't rock...
Blesta: Simple to use, Good implementation of plugins, super slow development. A lot of 3rd party development (not Good) so we are clear its not the coding by the devs. No real clear direction. What is built I like but its not complete enough.
Hostbill: Own Lifetime License. Simple to use, Good implementation of plugins, weekly development, no 3rd party plugins, not a subscription, nice admin area, good module choices for option past shared hosting.
I don't know until Clientexec or Blesta improve or some one makes a better app. I suppose I wait until I get more money or get smarter.. which is all negotiable.