Cook the pasta in boiling salted water until el dente, according to the package directions. Drain and rinse under cool water.
While the pasta is cooking, mix together the dressing in a large mixing bowl. Whisk together the yogurt, mayo, milk, dressing, buffalo sauce, and lime juice. Taste and add more buffalo sauce if you like things really spicy. Season, to taste, with salt and pepper as well.
Add the pasta to the dressing and toss well to evenly coat all the noodles.
Stir in the chicken, cheese, peppers, celery, corn, scallions, and red onion and taste again for seasonings.
Stir in some chopped cilantro and crumbled blue (or feta!) cheese, if using.
Cover and refrigerate until you are ready to serve. The pasta salad can be made up to to two days ahead of time. I like to bring it back to room temperature before serving. If it dries out at all in the fridge, I add a splash or two of milk to loosen it back up again.
