The actual job I'm doing is different to the one I expected I'd be doing, and I've had to learn and forget quite a lot of things along the way. I'm probably better off for these experiences, but it has kept me on my toes quite a lot and stopped me from feeling altogether too established in what I'm doing. As a result, I'm opinionated, but less concerned when my opinion isn't determined to be the right way for the matter in hand. I also have less of myself in the office than perhaps I did one year into my previous job.
This is not a bad thing.