Digimon Frontier was, and still is, my favorite season of Digimon. I not only grew up with it, but I find it less annoying than all the other seasons. xD The first season was great, the second was terrible, and the third was okay. Frontier, amazing for me. Data Squad? Terrible dub, so I'll have to check out the Japanese version. I have no opinion on Xros Wars, but it looks promising!