The answer is where you have had to actually follow Mitch McConnell closely to see how he works. When the Majority has around 52 to 55 seats, they need McConnell to give them 8 to 9 votes to overcome the three-fifths (60 vote) threshold for their legislative needs. It is in the process of trade and payment for those 8 to 9 votes where McConnell makes more money, and holds more power, than as a sitting Majority Leader.
Why does McConnell prefer the minority position?
The answer is where you have had to actually follow Mitch McConnell closely to see how he works. When the Majority has around 52 to 55 seats, they need McConnell to give them 8 to 9 votes to overcome the three-fifths (60 vote) threshold for their legislative needs. It is in the process of trade and payment for those 8 to 9 votes where McConnell makes more money, and holds more power, than as a sitting Majority Leader.