Don't be hurt! I'd bet that your 20 posted comments mean that HUNDREDS of others have looked and enjoyed as well. This is only my 3rd post. But I have spent HOURS and HOURS here looking at everything, enjoying the pictures and learning. So I am very guilty of ooo-ing and ah-ing over all the lovely projects and great ideas without posting a thanks or a "Wow, that is great!"
A like button is a great idea. I'd sure use it to let folks know I appreciate what they've posted.