Tough question. The work I'm doing is challenging and I'm paid well for it, so yes, on that end I'm satisfied with it. I'd be lying if I said there weren't moments where I wish more of it were public, though, or that I could do something impressive in its own right rather than part of a major software system (and hence constrained by the other design choices made for that system), or that it doesn't sting when the project you're working on, which is doing some very cool technical things, gets canceled because it doesn't fit into the direction that your group is going.

I'd say that on balance, yes, I'm equally satisfied. But that probably means that I'll end up switching between the two a few times during my career.