Diaper Bag Recommendations?

Erin
Hey moms!!
  I'm looking for a diaper bag and was wondering if y'all have chosen anything. I love the HipCub medium tote, but it looks HUGE! I've heard conflicting advice- oh get a big one, you'll need to carry so much! to we just use a kid backpack, you don't need much. Just wondering what y'all have found! I'm not quite sure what I'm looking for yet. 
TIA!