In no particular order:

- No sexual chemistry/skills lacking, particularly in the bbbj department
- She's in pain from intercourse/can't take my size/complains about my size
- Don't like her body  
- Mechanical/ Rushes / no IOI or IOP
- Just didn't feel the "spark"
- Find out she does BBFS (with the sole exception of my queen, my goddess, CHERRY DD)

Rock hard enhancements.

 
Do tell - who are these sweet honeys with bad hair???

Toothy bbbj!!!

- No passion
- No chemistry /excitement  
- GPS syndrome  
- Stank breath/pussy
- Shitty attitude  

One of these (with the exception of Stank breath/pussy/BO) does not necessarily guarantee no repeats. I’ve seen a number of chicks who had no personality or chemistry and were stingy with access to tits or booty etc but the sex was so good or their looks had me mesmerized that I kept coming back. A couple eventually warmed up. Others such as the goddess Connie (formerly of Bay area fame) whose looks are sultry sexy and tits are epically perfect, I saw once and never looked back. Didn’t have a bad session buy other than her tits, it just wasn’t memorable. Meanwhile Tera (whom I’ve heard described as butterface (?!) rocked my my socks off. Gia of GFEI is another whom I think of fondly even though its been about a year since we fucked. Neither Tera or Gia are perfect and FIRMLY in MILF territory but they kept themselves squeaky clean (I have never so thoroughly rimmed a woman like Tera and wondered if she shat from that hole) fit and ready to make porn-worthy memories. The good ones are not perfect but they make up for it in other ways that ultimately made their flaws less noticable. The others performances lack and or their flaws so glaring that no matter how pretty they are the become one hit wonders.

for performance, as reflected in my review of her, it's an automatic that I won't see her again, regardless of how much of a goddess she might be in appearance.  

 
Most often, the reason is lack of a social connection.  If we note connecting during the first session, then I usually will not try a second time.  By connection, I don't mean making a love-match, but just laughing together, trading some verbal barbs, and showing a genuine interest in leaning about each other.  Sometimes, the reason is that the girl has a bad attitude from something else on her mind.  If she has drama going on and can't push it back during a paid session so I don't see it, she won't get a repeat from me.  About 20 percent of the Kgirls I see do not get a second visit from me for these reasons.  One clunker session out of five isn't bad in my book.  There is a lot that can go wrong, so I consider myself lucky that it's not more.