All of us probably have a favorite season, even if it is more than one.
For example, mine is the original Digimon Adventure (not counting Tri. because it is still very new). This is because I love how there are multiple different villains throughout the series with action-packed and drama filled scenes that keep you on the edge of your seat. I also love the characters and with each of there different character traits they were able to pull through as team, contributing they're strengths, to save the Digital World. The character development was pretty good too, except for Kari who didn't really have any. And finally, I love the different lessons the series brings out about specific character traits that make us stronger: Courage, Friendship, Love, Reliability, Sincerity, Knowledge, Hope, and Light. Plus, it's a classic. You just got to love the classics, lol.