[pvnk]

Personal preference is "Like", as a post that you aren't necessarily thankful for can be liked.

I agree, it makes more sense. However, it's also used in social media a lot.

I'm open to either, but I'd probably vote for Like.

Thank would be more forum oriented and could have a sense of promoting helpful comments, whereas like would be more individual tastes catered and could possibly have a sense of promoting low quality comments.