I stopped carrying a saddle bag for a long time because the velcro that went around the seatpost would invariably catch my shorts and mess them up. But it was always a pain on long summer rides where I'd have to carry an additional bottle and lots of food. But then I saw a saddlebag that only attaches to the seat so I got that and have been using it since. Frees up pockets better, especially since I now always carry my phone in my center pocket.