I have two options, straight down the road (12.5 miles) or down a really crappy cycle path (13.5 miles, but puts 1/2 my journey on the cycle path).

Road: More dangerous but much quicker, 10-15 minutes quicker than the cycle path on average.
Cycle Path: More relaxed ride, takes much longer and puncture risk is high.

I only have a road bike with skinny tyres so I'm considering buying a hybrid next time I buy a bike, would suit my riding a bit more and allow me to go off road a bit (tracks/trails that is) when needed and the thicker tyres will help in the winter and on the cycle tracks/paths. Bit more room for pannier racks hopefully.