I prefer the term skilled driver: A driver who drives often and has a lot of experience.
Being a good driver depends on the definition and goals you set and is a bit arbitrary.
I know I am a skilled driver, I make a lot of kilometres and drive in the most difficult circumstances. But a good driver? With certain kinds of parking (parking in NL is a lot tighter than in the US) I have difficulties and I can be a bit pushy towards weekend-drivers. Not a problem during the working weeks, but in the weekends it can be a bother. But that takes practice and patience, so in time I should learn that bit.