For an everyday commuter for 2x10miles in the city, look for the following features:
-tyre clearance for 32mm+fenders (min), more for winter studded tyres.
-threaded eyelets for fitting rack and fenders.
-Kevlar protected tyres, even on cheap bikes.
Consider:
-Disc brakes for all-weather consistent braking.
-Hub gears for low maintenance.
-Hub dynamo for fit and forget lighting.
I dont make a big deal out of drop vs flat bars or 700c vs 26" wheels or steel vs aluminium, they all work for me.
Pick your route with care and learn some vehicular cycling techniques.