I would like something that will look good on a t-shirt or coffee mug. Thus, the logo should say something about the person who wears it more than the company who sells it.
Imagine you see someone with your logo on their t-shirt. It should communicate that that person is an achiever and has control over their life in such a way that you want to ask them about it.
So, clip art and silly metaphors are out. Complicated is okay if a small scale version without the details is included (think cufflinks).
My clients are older professionals and the logo has to look good in corporate settings. Logos that look like some cheap life coaching picture shouts "I'm in therapy and can't run my own life."
This logo has to communicate strength, determination, and self-control while fitting for men or women. Of course, if you want to have two slightly different versions for male and female, I am open to that. I am open to paying more for really good work, so be creative. I have no preconceptions of what this should look like. Just make it something people would be proud to monogram on a nice shirt.
Found a picture that is interesting as it seems to capture a P and a Q facing each other to make a shield. Maybe this helps.
Don't feel constrained to use P and Q in a letter logo. If you can think of a metaphor or image that implies "path" or "quest" it would be fine.