It is funny in this digital age you can blow through hundreds of shots easily of nothing good but with film you want to make them count so 24 shots can take a while to finish.

As a kid I loved 126 format, 10 and 20 shot rolls though my Dad hated it as I could go through a roll pretty quick. Today I like 6x7 in 120 format, 10 shots again so I can easily finish a roll off in one session, get it in the tank the same day.

For 35mm processing my own however I much prefer 36 rolls as they fill a reel. 220 would be more efficient too, 20 shots instead to fill a reel and use the same chems as 120 though you can put a pair of 120 rolls on some plastic reels.