Pride yourself on
Definition 1 of 1
Pro Tip 1/3Self-Achievement
Use it when you've accomplished something significant and feel self-satisfaction. 
He prides himself on running a marathon.
Pro Tip 2/3Positive Trait
It's often about a positive characteristic or skill that you value. 
Marie prides herself on her empathy towards others.
Pro Tip 3/3Personal Effort
Highlight personal effort in achieving or maintaining something, not just natural talent. 
Jack prides himself on his meticulously kept garden.