I don't know if anyone's brought it up before, but I'd love to have more view modes in the unit list. I'm constantly having to scroll down, press c on each individual dwarf, just to find the dwarf I'm looking for.
Tab should switch between modes like in other menus. One mode should be a concise list of units' skills, arranged like the military menu. With each skill abbreviated to 3 letters, maybe 10 skills would fit at a time, and you could scroll left and right between skills. Writing the skill names in different colors would designate the skill level for that dwarf. This way, you could easily search for an extra, say, leatherworker, and be able to find that one guy who did some leatherworking a few years ago but was moved to something else you don't quite remember.
Another mode should list currently assigned jobs in the same fashion. Perhaps you could even assign jobs the same way you can assign weapons in Military mode. Since tab switches between modes, you could easily match up dwarves' assigned jobs with their skills.
Finally, a mode that lists their basic status would be useful. It could use the same status icons that flash behind them in the game screen. That way you could easily look through to see who's unhappy, who's injured, which dwarves are recent migrants, etc.
An easier alternative to this, while not quite so useful, is to add + and - to the view menu, to scroll around among all the dwarves in your fortress. Rather than having to move the cursor around so it selects every dwarf and displays info about them, it would jump between units in the same order as in the unit menu.