I grew up with a Swiss mother and attended International Schools in California, Paris and Zurich. My relatives are Czech, Catalan, Spanish, French, German, Swiss, and American. I went to school with Iranians, Latin Americans, Russians and Europeans.
My father is a composer and I grew up as a musician and singer. I got an MFA in Acting from NYU where there was strenuous emphasis on dialect work via IPA (International Phonetic Alphabet).
Accents and Dialects:
British (upper class)
British (cockney/east end)
Irish
Scottish
American Southern - Mountain (heavier R)
American Southern - old south
American Surfer
American Minnesota/Midwestern
American New York
Russian
French
German
Spanish
"Indeterminate European Expat Businessman" - light accent of someone who has lived in many places and speaks many languages