MC275 Tube Rolling...

I would love to roll some tubes with my MC275 (the current production version V) It is highly appreciated if all you who are experienced drop a few lines... I would like to know about the tubes that you have ever rolled on this machine from the beginning until the end, the sound characteristic for the each of them and the one which you settled down with and of course... why the choice... Yeah, I am clueless of what tube to get since there are so many out there... All your inputs will be extremely valuable to me. Thank You So Much!