I torque most bolts, particularly anything that turns or spins, which are most parts on a bike. I don't bother torquing things like brake levers, shift levers, seat rails, and pedals. I make sure I torque components like my bottom bracket, crank arms, stem bolts, seat clamp, brake calipers, and cassette. Anything that clamps to carbon is a good idea to torque. I think half the problems people have are related to over or under torquing.