i'll tend to play mostly in the medium-hard range for all instruments (drums, pro drums, keys, pro keys, vocals, guitar, bass, *do not* have pro guitar yet as too difficult to find at this point).
i can play some songs on regular keys on expert, but other ones are terrifying, hahaha. i actually play piano, so trying to get used to the way it displays piano in regular mode and pro mode is a little strange. kind of like relearning how to play the instrument. (but of course has to be set up that way so folks who have never played keys before can figure out how to play). for me it would be easier if flashing actual music notes went by on the screen for the keyboard, heh, but i'm starting to figure the rock band way out and translate some of it in my brain
i just got the cymbals a couple days ago set up for pro-drums and have been doing pretty decent on medium-hard there too (though still getting used to seeing the different markers on the screen for the cymbals)
i don't have set times i'm normally online. sometimes i will be on for a bit after i get home from work (so a little bit after 3 pm atlantic standard time) on weekdays. other times it might be in the evening after dinner for a bit on weekdays.
weekends i might stay up a little later to play, but depending how late i'm playing, may switch to other instruments that are quieter (ie: bass/guitar) to not annoy any neighbors in the apartment building.
Bratness is my PSN id.