as an owner of a hybrid and road bike that both see service in commuting duties (fair weather vs. foul weather), i can say that the road bike is A LOT more fun to ride. the only reason i don't ride it everyday is because it's not well suited to rain or winter. when conditions are less than ideal, that's when the IGH/disc brake hybrid begins to shine.

if, like me, you're ok with backpack commuting, a nice lightweight fast & furious road bike just can't be beat in the fun department in my opinion, but it's also a really good idea to have a back-up foul-weather bike if you plan to ride on rainy/winter days.