Growing up in midwest - I loved summer sausage and Brats.... that was a staple at any parties, bbq, gatherings etc.
Can't find good ones in NY/NJ though... (near my place in NJ at least) that I can easily snatch some when I get the urge. (And no, Johnsonville doesn't cut it..)
Other than that - I really like all types of sausages. It really shows that a pig really has nothing to waste. Polish Kielbasa, is one of my favorite too. I use them to make Jambalaya, instead of Anduille sausage. (Can't find good Anduille sausage around here either)
Even though it's not really a meat filled, but Korean Sun-Dae is one of my favorite too. So light and yummy, and can't beat the Sun-Dae Gukbop in a chilly day, or after night of a heavy drink...