1. Hyperfocus. It has been tremendous for programming or even reading. There's sort of an ADD threshold that I break through after ~30 minutes of self discipline and pain. Then I'm suddenly in the zone, some kind unshakeable state, for hours on end. Most people I know seem to need a break after 30-60 minutes, right when I'm just getting into it.
2. Fun and physical activity. I use extreme difficulty of maintaining attention as an indicator that what I'm doing is just not stimulating or interesting enough. Of course this might not be good when you're with other humans, but I find I'm often able to focus on things better when my body is moving. That means when I take someone out on a date somewhere, it's usually very interesting and unusual.
3. Fast context switching. This may be more of a coping mechanism than a benefit, but often times rather than focusing on a single task, I'll "procrastinate" by switching between multiple important tasks repeatedly or working on things that are peripherally related. As a result, I have a breadth of knowledge that helps me think creatively and still get work done as needed.
4. Creative thinking. I believe (anecdotally, no evidence) that people with ADD are less likely to get stuck in a rut, or get bogged down with repetitive, boring, familiar things, because we simply don't have the attention span for it.
I havent noticed any difference in how fast I recognize changes between me and coworkers. If at all, I seem to miss changes more often, as my mind usually goes "was that allways like that? I guess so", since recall of memories can be pretty flaky
