the tattoos all look quiet good, i just think that a "sleeve" should at least have some kind of theme.. not just random pictures all thrown together.. but thats a personal preference.. great work
the ones I like best, {for what thats worth, lol} are the ones by Tony, Michael K. and the pin-up by Jerry Thrash really speaks to me {I know, corny sounding} but I really like the "feel" of it
I like in my minds eye how some of what you suggested would look. esp. the flowers in gray shade, just kinda jumped at me. To be honest though I'd go to your artist and see what they say.
oh, I've just gone round & round about with some of mine...my flag/cross for instance started as a whole "flag draping down my arm" piece, but then I like the "individual" pieces on their own.