Fun, you say?
It kind of depends what your definition of fun is, really… there’s plenty of bikes out there that match your other needs. Cyclescheme’s best selling bikes are mid-range commuter irons like the Specialized Sirrus Comp and the Trek 7.5FX, and for good reason – they’re light, fast and versatile. If you want something a bit more heavy duty (say, if fun means a bit of rough stuff or touring) then cyclo cross bikes like the Kona Jake and Specialized Tricross) make great commuters. If your commute is over some high kerbs and down a flight of steps, then what about a Cannondale Hooligan? they’re fun. Oh, but guards are out. And if you’re commuting on the flat(ish) you could opt for a fixed or singlesped; the Condor Pista is a great all-round bike.