I too shall jump on the Colossus bandwagon, that whole ride could be elevated to a new level if only Merlin invested in some new lapbar-equipped trains. The ambiance, look and feel of the whole area is great as is, shiny new trains though...
Also, not that this ride is bad but the airtime hills and final helix of Cobra at Paultons Park have no right to be as good as they are. My favourite part of the ride by far.