I think I'm a nice person (at least, a fortune teller once told me I had one of the kindest hearts she'd ever 'seen'
). As to whether it's worth it or not...In an immediate context, it may sound corny or whatever, but it's worth it to the people who are worth it. What I'm trying to say is, the people who recognise and value your kindness are the people who deserve it; and they tend to make up for the people who shove it back in your face.