Best engines we ever had for reliability and long-term operating costs were the RB211-535E4s on our 757s. One of them stayed on the wing so long that our Tech Records thought we had forgotten about it. The Rolls-Royce customer support was cracking too.
The Pratt guy shows up now and again and we have his home number to get him out of bed when we need him! Now, that's what you call service
The GE reps were regular visitors, though that may have had something to do with the way they were running three times as many ADs as the Rollers and Pratts put together.
The V2500s on the "Booses" are a bag of !!!!!. Cost us our A319/A320 ETOPS rating for many, many months, they did.