Very true, spoken as someone suffering from ADD. I'm already highly motivated by positive reinforcement: if something is in any way technical, or hierarchical, or requires learning new skills to master, I am all over it like gravy on biscuits. It isn't hard for me to "trick" myself into enjoying a topic I might have previously decided was not worth my time.

However, if I really just don't like something at all, or if it is something that isn't really motivation-based but requires schedule-keeping (maybe some random deadline at work), it's very hard for me to naturally elevate it to a high priority in my head. The things I enjoy come first, even at the expense of logic or self-preservation sometimes. If there is a strong negative motivation applied to the goal, like "So-and-so person is going to stop talking to you if you don't do this", that can be just the push I need to override my damn brain.