I am by definition a twiddler. That's not quite the same as spinning which suggests a high cadence, which in my case I have not got. Neither am I a massive torque monster. In my cycling life I made it my mission to somehow make sure I had low enough gears to ride up any hill, even without rising from the saddle, no matter how slowly. Not so straightforward pre mountain bike gearing. This led to such comments as, "how big is your small ring, then?" (For me to know, and others to wonder about!) and "Look at him, could he go any slower without going backwards?" or "He's hovering up that hill!"
Since I discovered recumbents and old age almost simultaneously this has introduced another set of interesting issues to overcome. My weedy legs have got weedier. Horizontal cycling, while making efficient use of what power you have got, causes you to become more of a spinner due to having a shorter effective power stroke so It's noticeable that when I ride my diamond frame bike I spin more on that too. I am no faster up hills than I have ever been, however. Maybe the answer is, as it seems to be to most things, to get out and ride more.