If space is at an absolute premium, it's my Sony RX100, which is one of the best point-n-shoots I've ever used, and it's fully manual as well. But, in general I'll use a Nikon d750 with a 24-70, 70-200, and a 20mm f1.8. That's probably more weight than most people want, but I'm usually disappointed in a crop sensor, like my older d7100, because of low-light capabilities.