My girlfriend was diagnosed with ADHD as well a few years ago, after her son was. She's on Concerta in a special delivery mechanism that gives her a 'boost' after a few hours; it's not an all day thing but it gets her through most of it. Same with her son. Ritalin is described over here as a short-working medication; you should look into other medication as well. My girlfriend mentions that her medication is subtle, but effective - it helps with mood swings and all that.

However, I can imagine that some aspects of ADHD - notably the hyperfocus - can be considered a positive trait, something that is hard to let go of. And that's fine, if you want to have it you can skip the medication just fine.

However, you also mentioned RSD; my girlfriend described that the medication she's on helps a lot with daily mood swings. She seems a lot more patient and resilient about small things in the day now that she's on the medication. Do consider it if you find yourself struggling in e.g. the workplace.