To be honest, I actually like that there isn't a like or kudos option for posts since it forces someone to write a response. Of course, there are times when you want to acknowledge something but either feel you don't have to words to respond, or there really isn't a need to respond, and in those cases, it would be nice to have the option to like something. At the same time, I think that the option to like something simultaneously increases the distance between users, because it gives a way out of what could be a potential conversation between people (I'm thinking of kudos/likes to comments ratios on both AO3 and Tumblr, and how fics/posts will have several kudos/likes before a single person actually says something). So, I can see how people would want it, but I feel like it would be nice to experience a website without this option for once.