Haymitch is one of those characters that I think everyone has a different visual representation of. Well this is roughly mine. I thought of Haymitch as this cynical, sarcastic, middle aged man. He was very short, but nonetheless seemed to tower over everyone (especially Katniss) with his arrogance. But he did have a heart, even if he didn't show it very often.
Drawn from scratch, no references. Overlaid with watercolor found here: [link]
Other Hunger Games art: [link]
(yes, I'm lazy, I've drawn too many characters to just list anymore
And may the odds be ever in your favor.