APS-C Mirrorless. It's small and takes professional quality pictures, IMO. With certain lenses it's almost pocketable!
I use the Sony A6000 series. With the Sony 35mm f/1.8 (equivalent to 50mm) it's my fav all around lens and is so small! People think my pics are from a massive DSLR camera.
My favorite portrait lens is a Sigma 56m F/1.4 (85mm equivalent), and I can't believe how small these lens are!
I wanna switch to full frame someday but i can't see myself lugging those heavy lenses across the world.