I'm not looking to work in the industry right now (although never say never), but I'm going down the DM route because I wanted to hone my diving skills and become more self-sufficient.
The program has been excellent for that, but I would have loved it if there was a course or other mechanism which helps keep skills sharp and works on any gaps. If my LDS ran a monthly basic/rescue skills refresher program, I'd be there in a heartbeat.
As it is, my regular buddies and I have agreed to occasionally spring problems on each other on shallow shore dives, just to keep our skills in shape (eg someone has a 'cramp', someone sinks to the bottom and is unresponsive and needs to be surfaced).
When I get the DM cert (should be in the next week or so - doing it very part time) I'll volunteer to help out on an OW course here and there to keep skills sharp. But (anyone from a training agency listening?) I and many people I know would love a regular refresher program just to make sure we're doing things correctly and keep us 'non-pro' DMs, and anyone who wants to hone their skills, up to speed (because I feel if you have the DM cert, you need to make sure you're worthy of it on an ongoing basis).
An unexpected benefit has been the pure joy of introducing someone to the underwater world, on the OW/DSD courses I've interned on. And the enhanced understanding of the physics and physiology is also a great benefit.
All the best to everyone.
M