Marshall 1960TV by Danbonefinger
I love running it by putting the cab in another room while keeping the head in the studio so I can hear the adjustments I make. It makes life easy because you can switch out heads to get different amp sounds and not have to move mics once they're set.
Having a well made open sounding 4X12 is a luxury but it saves a ridiculous amount of time because you can put several mic set ups on it to get different tones and once it's all set you never have to leave the studio.
Also guitarists always get excited by big vintage looking cabinets...