Must attend for me would be USAC Sprint & Midgets @ Toledo, AVSS/ISMA @ Toledo, HyMiler Supermod race @ Sandusky, any NW race at Gas City or Kokomo, The Old 4 Crown @ Eldora, any Must See Racing Open Wheel Show (Berlin was great), any Fremont OH Sprint Car Race, & the Hewitt Race @ Waynesworld (Waynesfield). Thats all I can think of I recomend. My Bucket list Midget race at The Indy Speedrome, Little 500, USAC @ Knoxville, The Burg, & a few others I'm sure
DuQuoin champ cars, Hut Hundred at Haubstadt, No Way out 40 at Vernon, Any race at Terre Haute with Sargeant/O'Conner doing track prep.
DuQuoin IMG_4799 copy by uncloose1, on Flickr
Hut Hundred IMG_3201 by uncloose1, on Flickr
Vernon IMG_0042 by uncloose1, on Flickr
Terre Haute IMG_8960 copy by uncloose1, on Flickr
The best races I've seen the last couple years have been the Herald & Review 100 @ Macon(on a Wednesday night, usually right before Sprint Week starts).
The Icebreaker @ Brownstown is usually pretty good.
SprintWeek race @ Brownstown was awesome.
Although I haven't attended the North/South 100 @ Florence, it's on my list.
Of course, the World 100 @ Eldora.
I don't think I've seen a bad midget & micro show @ Belle-Claire Speedway.
All of midget week
All of sprint week
Indiana Ice Breaker at Brownstown
No way out 40 at Twin Cities
3 hour figure 8 championship
The final MSCS show at Bloomington