I was in that situation till I was 33, when I sort of forced the issue by getting pregnant (by completely the wrong man - not suggesting it's a brilliant idea!) I'm anticipating being in that situation again by my early 50s, when DD is off dong her own thing - can't really picture myself being coupled up. I think it can be a really good life, but it's only fair to acknowledge that it can be lonely too at times.
I would/did move around a lot to do different jobs, and it was great to be free to do what really interested me, as opposed to jobs where I could get home in time for nursery/school pick-up. I did travel a lot, and it was great, although again, "table for one" yet again can be a bit wearing. In that situation now, I think I'd join up with the group trips for solo travellers.
It's important not to get too stuck into a routine - you've got to keep trying new things and challenging yourself. What does an authentic life feel like to you, and what do you need to do to get it?