Maybe it doesn't make much sense to ask that on a basketball board, but since someone asked me and I didn't really know what to choose I'll forward you the question:

"If you could only watch one of the following categories regarding the Olympics (but every single second of it...not missing anything if you like to), what would you choose?:

1) ball sports: basketball, tennis, beach volleyball, soccer, badminton, etc.
...fun to watch but we see most of them all over the year anyway.

2) the three big foundations: swimming + gymnastics + track and field
...Olympics without them would feel weird.

3) everything other than 1+2: rowing, shooting events, fighting stuff, cycling, sailing, horse riding, etc.
...probably most medals combined and often your only chance to really watch these sports.