A whole bunch of double sink ideas from Houzz:
One benefit of a double vanity is the extra storage gained beneath. Lots of drawers and shelves mean a clutter-free bathroom and never missing a clean towel or a roll of toilet paper.
I seem to like those photos with tile floors, white sinks and light wooden units / drawers / shelves.
In terms of how the sinks are plumbed in, the sinks below have the pipes in through the sink unit (not from the wall).
But I am biased towards a single handle to control the flow rate and temp, coming out of a single outlet.