If I feel the need to spam buttons non-stop for 5+ minutes bossfights I just play Retail
But I personally find that more tedious than exciting. It's not that Classic isn't tedious, but it's more about the people than the action.
Granted, bosses in Classic could have had twice the HP they currently have and that would have been a nice change, and world buffs could have been disabled in raids, but I do like really really enjoy the lack of tight enrage timers. Onyxia being killable by 3 people with enough time is a good example of how a few very skilled people can compensate for half the raid being dead. In turn this means that I don't have to find a guild of hardcore elitists in order to play the hardest content, I can just play with the people I want to play with, and if some of them has be carried, then that's not a hassle at all.
Fun fact: our server has one guild of hardcore elitists, and literally the whole server does everything they can in order to sabotage their attempts at glory and world records. I.e. delaying AQ opening and making sure they don't get world bosses. They're the laughing stock of our server because they try unnecessary hard.