So I was reading Larry's post the other day on PFRE about the fact that some real estate photographers seem to wonder if other real estate photographers shoot anything else other than real estate (what a sentence). I thought I'd give my opinion on that one: Yes, and I'm proud of it.
Take this whatever way you want, but I like doing two things: paying the mortgage and photography. It's because of one that I can do the other, and vice vera. My view is that if you can make a living taking pictures - no matter what particular area of interest - you're doing just fine.
One drawback, and there's truth to it as well, is that a jack of all trades tends to be a master of none. Look at it this way - Person A shoots architecture full-time for 5 years while Person B shoots architecture, portraits, and weddings full-time for 5 years - all things being equal, Person A will be ahead of the curve when it comes to architecture. There's really no disputing it. Hey, I admit it, I'm Person B and I love what I do. How about you?