Same here. I don't do the interstate thing unless I actually have to be somewhere at a certain time. And I try not to plan a ride that I ever have to be somewhere at a certain time LOL.
Indiana's one state I haven't been in yet. As far as Illinois goes, I only went through enough of it to say that I'd been there. Came up through the Land Between the Lakes in KY, crossed the Ohio and Mississippi Rivers right there in Cairo, and then was in Missouri before I could even blink. I have a concealed carry permit and a LEOSA permit, but riding through Illinois while I'm armed still makes me nervous.
Kansas almost did me in. I've crossed it three times now, and it's always been a real slog (especially in mid summer). No offense to any native Kansans intended, but for a Northeast boy like me, all that flatness and horizon really puts the zap on me.