I check out my emails for what my 'favourites' have been doing and comment accordingly, then every few days I browse the galleries and fiend anoter few faves and friends as I upload images.
I only ever give out 5 points for those I really like, I don't know how to rate those that dont catch my eye as well. I often like to see the WIPS and new members and say hello and comment on them as I know how it was when I first joined and Melizod helped me. I try to put any critisism together with a solution in as nice a way as possible as I am no expert but try to help without offending. I too love it when someone comments as it is such a buz. Even if they just say 'Nice pic'. It is nice think someone took the time to comment.