The American sports just don't have the connection to global history and culture that football does.
I do like the occasional NBA though, but other than that it's slim pickings. NFL is somewhat tolerable but neither are anywhere near football.
True, football is just inextricably linked to history and culture in a way those sports are not.
Those sports seem kinda 'fake' to me, in the sense that they seem to lack passion and feel a bit plastic. But maybe it's because every time I tried watching them there were too many ads.
I tried to get into American football three years ago. My dentist recommended it. It's actually decent, but I can't imagine following it frequently. Maybe just the Superbowl (which i have never watched).
Ice hockey looks good - kinda like 5 a side football on skates. I liked playing NHL games on the SNES. Very fun smashing shots at the keeper.
I think i said before but I really like swimming, athletics, volleyball and handball (I like tennis too in theory as I know you love, but never really watch it).
Got zero interest in stuff like golf, cricket, darts, rugby, polo, baseball and so on.