Springs are the bulk of it - torsion and extension, broken and worn, on single and double doors. Openers come next: dead circuit boards, stripped gears, remotes that stopped syncing. Track and roller work shows up constantly on the 1980s and 90s builds that make up most of this area's housing, since steel rollers and bent track from decades of use are the norm here, not the exception.
We do panel repair and full door replacement when a repair isn't worth it anymore - and sometimes it isn't. If a door from the 1961-1993 era has a cracked panel on one section and worn-out everything else, patching that one panel is a short-term fix we'll say so on the phone, before we're in your driveway.