I think at the beginning of her career she prefered circumcised but, after years in the business working with uncut performers abella changed her preferences.
She said this on a tweet:
I actually love uncut penises, especially for anal but I like circumcised too especially JD.
She also said in a later interview that manuel ferrara is her favorite to work with and she likes both types of pennis. Here is the interview:
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She's one of my five favorites. Her, anika albrite, kayden kross, aj applegate and gia paige. All these girls do great scenes with uncut guys and 2 are in relationships with uncut performers.