I feel similar. I'm good at my profession (very white collar) and have managed to start my own business based on a good reputation in the industry, solid outcomes etc. I'm pretty good with my hands and troubleshooting so I'm handy in a crisis, good at solving problems. I read a lot about lots of different things, I listen to a lot of different music so I'm a good person to have on your trivia team. I've kept pretty fit into my late 30s so I'm up for any exercise or going for long rambling adventures.
But am I great, beyond my peers at any one particular thing? God no. And it bothers me. I wish I was really, really, really good at any one thing to the point someone would call me an expert, but I'm just not. I don't have the energy, interest or focus to dedicate to one thing, so I'm just 'okay' to 'pretty good' at a tonne of things, but not necessarily better than any one person in the room.