What's the least fun you ever had for rewards?

Let's face it - we do stuff in game to get stuff in game. It's in our greedy little natures. So it isn't surprising to hear that players will do things they don't enjoy if they believe the reward is sufficient to warrant it, but it still has interesting things to say about us as players. Ghostcrawler tweeted the following and it got us thinking.

For myself I'd have to admit this is true - as just one example, I really didn't like the Isle of Quel'danas when it first came out (on my server at the time the area was extremely crowded) but my tauren needed a good shield and the expertise neck for his tank set. I didn't need the expertise proc, however, so I had to switch from Scryers (which I was exalted with) to Aldor (which I was not) at the same time I was also grinding Shattered Sun reputation to exalted. It was, frankly, agonizingly painful for me, but I did it. The best part was, of course I eventually got a better neck. But there was no way I was going to grind Scryers back up to exalted by that point, and so he remained exalted with the Aldor.

So this leads to the question - what about you? Have you done something you didn't want to do or didn't enjoy purely for the reward at the end of the rainbow? Was it worth it? Or, like me, did you end up with a sour taste in your mouth (and a whole lot of trouble remembering which base in Shadowmoon Valley was safe to land in)?