I suppose I can look at it and go, he's getting more money, but doesn't have any of the responsibility(...)which means no extra hours, or weekends..

Hee. Way to look at the bright side! =)

it's just the overlooking and the opportunity that wasn't offered that irks the most...

I know what you mean. It's that unfounded assumption that people make that you're 'not interested' that can really bug you.