a user liking a post

I've noticed that the concept of a user liking a post is deployed in a
number of systems.

But it seems there are a number of ways of doing it.

I just wanted to see if there are pros and cons of different approaches.

Right now I do something like:

  <#me> <http://ontologi.es/like#likes> <content>

It seems simple, lightweight and meets my needs.

Are people in general going to use AS2 for this, is there a good vocab to
switch to?

Thoughts appreciated ...