Absolutely. I enjoy it so much that I wonder "do people actually NOT enjoy writing Ruby?" It's usually the first tool I pull out of the toolbox for DSLs, scripts, spikes, one-offs and the like. A lot of the time, the project will happily stay in Ruby unless there's a good reason to use something else. And then I move it - horses for courses.
I programmed professionally in C, C++, C#, Deplhi, and a few other languages well before I had even heard of Ruby.
I programmed professionally in C, C++, C#, Deplhi, and a few other languages well before I had even heard of Ruby.