Well, in the begging of the second book that is all he does, but remember that he also review Peeta, sacrificed Mags, and protected Katniss and Peeta. And that's just the second book. I cried extremely hard when he died, and I know that I'm not the only one. Plus, he's just an all-around funny guy.Why does everyone like Finnick?
All he does is this, "Hey Katniss, Want Some Sugar? *Wink Wink*."