As a business flyer who winds up in small towns with regional airports waaaaaaay too frequently, DL's RJ FC is really what made me switch carriers.

Thanks, Delta! ^

My preferred seat is 1A (well, actually, anything on the left side of the plane). I like having the little slide-out cupholder on the left-hand side of the seat as well as the fold-out tray table. There really aren't any bad seats in this cabin. YMMV with the RJ service, though.