I loved Digimon but I only really watched the first two seasons, a whole new cast of characters isn't my thing because if I want to see new characters I'd watch something else. Although there's a part of me that does like when they do that because that means I get to stop watching the anime finally. :)
My favorite characters were by far all of the Kamiya family, Tai knows how to make me laugh, but then again so does Joe and Tentomon, lol. But as for my favorite Digimon, I'd probably stick with good ol' Fridgimon on his debut; he was one funny ball of frost. That's all I really liked the series for (mainly season 1) since they made it very comedic so people can actually put up with the "Agumon digivolve too!" type deal they did ever 3 seconds.