Aw bless you. sorry I was a bit terse. I'm hungry I think ;(
Likes are a lovely quick way to say Thanks or I agree or Oh yeah or Useful. You can see them coming up on your Alerts top right and admin can search on most Liked stuff. They also affect your status as a member in the default system.
Personally I'd like an addon to split Likes into a short selection Like / Power Like! / Agree / Thanks/ WOW!
maybe Not my cup of tea (Dislike is considered too discouraging)
there is an addon that lets you create as many litlle icons as you want but it adds under the Likes
Keep posting queries and we'll help. Questions are interesting and give us a chance to be knowitalls and feel powerful!!!!