Festivals happening at the Summerfest grounds. Cultural Festivals (for the education & food) and Summerfest (for the music. ex: Pentatonix, The Neighbourhood, The Fray, etc.) are what I am looking forward to the most!
Summerfest! State fair! So many lakefront festivals! So much food! Personally I really like Jazz in the Park, if that counts. A little smaller, but it has such a great atmosphere and such an interesting mix of people.