I have a theory, the current doctor when you started watching is your favorite doctor. Would this apply to you?
I started watching Dr who when the reboot was 3 seasons in, I think David Tennant was the greatest doctor. A few years later I finally got wife to give it a shot as I started a fresh rewatch in preparation for Matt Smith's second season, she was ok with Eccelston and Tennant but Matt Smith is far and away her favorite doctor. Does this pattern hold true for any other Dr fans?
This is like choosing a favorite child, I love them all. I did start with Eccleston and followed the new series from there. For me 10 is still my favorite, with 12 close behind. Haven't watched 13 yet but starting on Jodies series now to catch up for the 60th anniversary.