Have a soft spot for somebody/something
Definition 1 of 1
Pro Tip 1/3Emotional Ties
The phrase often refers to an emotional connection that influences someone's feelings or behavior. 
I always have a soft spot for my hometown, it brings back so many memories.
Pro Tip 2/3Hidden Affection
This phrase can indicate affection that is not immediately obvious or is surprising given the context. 
The tough coach has a soft spot for the least skilled player on the team.
Pro Tip 3/3Affecting Choices
A soft spot might influence decisions, like giving someone preferential treatment or overlooking faults. 
She has such a soft spot for her students, she often gives them extra time on assignments.