Just had an interesting conversation with our mechanic about this some days ago.
He works on FW and RW and said there is a big difference between the pilots who fly them.
His opinion was that RW pilots had a much higher awarness about what was going on with the machine. From doing better preflights to knowing the components of the machine.
Also the heli pilots seemed more lighthearted, almost like big kids with their toys, but serious when needed, while most FW are all business all the time.
He also said the differences only got more noticable the more hours the pilot has.
Don't know if I agree with all of this, but it is an interesting viewpoint from the outside looking in.