Nowadays I use both a saddle bag and a handlebar bag. I carry all kinds of stuff: two tubes, three CO2 cans, a mini pump, chain tool, multi tool, extra chain link, tire levers, extra gloves, latex gloves, chemical hand warmers, bananas, patch kit. Probably forgetting some stuff. If anything, I prefer the handlebar bag over the saddle one. Can still hang with the cool kids.