Let me put it in a different perspective. I'm sure everyone of us at one point in our lives have bedded a fat girl, ugly girl or for that matter, a fat and ugly girl or two in our life time. I know have.
Some of those girls were great fucks or they gave great head. Some of those girls provided both. Even with that being the case, I wasn't running back to see them again.
I have seen every girl that works or has worked at TW in the past 2 years or so and every one of them with the exception of Abby were at a minimum good fucks. That even includes May who quite frankly was a fabulous fuck.
That being the case, I have not run back to see all of them a second or third time.
Just about every girl can be "Good" in one spect or another, but it takes a package of multiple qualities to be "Great". Looks, Body, Hygiene, Performance, Attitude, Persinality and Effort.
Not all those factors need to sore high or perfect either. You need just the right blend of everything at various levels to be great.
When it comes to just that right blend for me, Vivian fits the bill there as well as Alina, Cindy and Eva.
I include Eva because any slight physical imperfections that she may have, she more than makes up for with Personality, Attitude, Performance and Effort.