I am not really sure what feedback you are seeking. What is the purpose of these things? They would fit perfectly on Dribbble.
The F & P work best for me, the M is way too complicated - All of the lines in the middle just become a muddle. The lighting on the F seems off, it is brighter on the inside.
That's exactly the kind of feedback I am looking for. Thanks. I wanted constructive criticism so I can fix the posters. I put them on Behance as I have nowhere else to post them.
Sorry to ask the wide community but as I have no dribbble account I find it hard to get feedback. I am no designer just a guy who has a design hobby.