Throwing a "like" someone's way on Facebook or elsewhere is a lot easier than having to write a comment.
But having to write a comment creates a conversation and builds relationship bridges when "likes" don't.
When you write a post and x-number of people "like" it, you get quick and dirty metrics on how validated you're allowed to feel.
But when you write a post and someone comments? Gold. Someone (presumably) read what you said and is having a conversation with you.
Throwing someone a "like", I will admit, is pretty lazy. It's an admission because throwing a lazy "like" is about 90% of my Facebook activity. You can "like" a post without actually liking or engaging with the person.
Writing a comment takes effort and forces you to actually - y'know - communicate with a human.
When I first started using 200wad I thought 'geez, the lack of a "like" button is really annoying, can't wait for that to be implemented'.
Now I've been on here for the better part of a week, and I think it would be a bad idea. I believe that one part of why this community is growing so successfully is because you can't just throw a lazy "like" someone's way. If you like someone's post you comment and say "hello [person's username], I liked your post!"
I've discovered two things:
1. When I comment on someone else's post it forces me to explain why I liked it, which deepens my understanding of what they wrote about;
2. When someone comments on my post I learn something new, every single time.
If we turn this into "yet another social network" we might lose this aspect, and I don't want to.