I found the easiest way to keep track of all my favorite Performance Expressions was to create a Tab page.
I selected a sample library string instrument with short notes.
I duplicated the same chord across rows. Then on a chord I started auditioning the Performances starting with Expressions. When I found a favorite I left it selected and moved on to the next chord in the row. And then onto next Pattern as I filled up a row.
And when you are auditioning the Rhythms be sure to think about using them to drive percussion instead of tonal instruments. Lots of nice but tricky sequences included in there.