Hello and welcome back!
I used to have a "signature scent" and it was Kouros for years...(guys please don't start). Only because I really loved it so much. I think it may have to do with age/maturity/attitude or whatever but I got both tired of using the same scent and felt like I was depriving myself of the pleasure of experiencing other scents. I just got more relaxed about trying different things.
As a result, I discovered many gems (and later, many more thanks to Basenotes).
Now, I don't understand why I would limit myself in such ways. I admit, I do worry a bit about what scent I wear in public (no RdV by MPG) but I wear fragrances (I always have) for my own pleasure. This is why I now rotate my scents based on my mood and the weather, and sometimes the occasion.
I recommend that you start rotating. If you still end up with a fixed group or even one scent, then fine.
I don't really think others would feel you're a flake because you use a variety of scents. I find that there are far more important factors you are judged by in life (if you even care about that).