Last year we voted for the best posts of 2017 and rewarded them with bounties and challenges. I think it's a great way to reward and draw attention to some of the best content the community has created throughout the year, so let's do that again. (And hopefully, this year, we'll be able to sort everything out before half a year has passed.)
First off, we'll need categories again, which you can nominate here. Each answer should contain a category for a challenge or answer to be rewarded. The top-voted categories will then receive separate nomination posts to find the actual winners. Like last year, I'm not going to state a fixed number of categories that will make it, but it's probably going to be between 5 and 15 again (last year, we went with 13 categories).
Feel free to resubmit proposals from last year regardless of whether they were among the final 13 or not.
Voting will probably last for about two weeks, but this period can be extended if needed.
As a further note, we'll need reputation rewards again, so if you're willing to spend some of your reputation on a bounty for one of the winners, feel free to edit your name into this list or leave a comment to indicate that you're willing.