There are lots of things I love about having our own studio — having the freedom to spend the time needed on a project to get the right solution, working hard to better us as a business, and thoroughly enjoying what we do every day (good environment = good work).
All of these things come down to one thing — being the (joint) boss and making the decisions. It's good to be the big cheese.
The best thing for me is having flexibility to spend as much time on a project as required, regardless of budget restraints. If we spend too long on something but we have a great outcome, it's been worth it.
A good portfolio will promote itself – so stock up on elbow grease.