The best thing I get from ADD is that adrenaline dumps dopamine into the brain. That means that in a crisis, when everyone else is freaking out, my brain suddenly becomes normal, leaving me calm and focused.
This is why I’m a meeting planner! I am super calm under pressure and give the illusion that everything is just fine.
Other than that, there’s the creativity aspect. When I was younger I wrote stories like crazy. However, I never finished them (there’s the ADHD kicking in). I am VERY particular about spelling and grammar (which is a good and bad thing) – hyperfocus and all that.