It also took me a long time to feel ready for intermediate but now that I am there I feel so much more comfortable.
I am a worrier.
i felt the same way. when i first started out, i was with a group that "bumped" you up if you were ready. you couldn't make the call yourself. then, i rode with a group where you could just go in any group you want; it was all up to you. i didn't feel comfortable with that.
i tried to ride novice for a day on a track that i already had around 1000 laps on. they kicked me out. (repetition is bound to make you better, i guess) once i was in intermediate, i stayed there for awhile until a coach came over and said it was time to move on.
i don't like deciding for myself because i'm naturally biased and think i'm doing awesome. i suspect it's that way for a lot of people.
now that i finally made it to advanced, i'm comfortable with the passing (and being passed) i don't think i would like it anywhere else. i'm maybe mid-pack with the folks i ride with, so i know i still have a metric shit ton to learn out there, but i went from "oh SHIT! look how close he's passing me!!!" to "nice effing pass, dude! awesome!" when someone rubs elbows with me...
to the OP... can you put more choices on the poll so us old-timers can vote for the 40 or 60 or 80 track day thing?