Road Atlanta and Summit Point have some pretty long straights, Mid Ohio also has a decently long straight.
I know a guy that runs the 1/4 almost every week and does Mid Ohio track days all the time, hes actually on here and he is @Trackbikez.
To address the frequency of how often do I get to take my track bike out and open it up? Whenever I get to a track day. How often do you get your standing mile bike out (so long as it isnt also your street bike)? Probably every time you go to a straight line event lol. To address the rest of your question, I already did the whole open it up, and keep it there thing back in high school. I was young and dumb with a liter bike and I did those wide open throttle highway runs occasionally.....
If you are hooked on a straight line, a lot of the other stuff is relatable to track days. I'm sure you've met a bunch of awesome people at those 1/4, 1/2, full mile events. Same thing with track days, I've met some of the most genuine awesome people in my life period because of track days. I'm sure you have a lot of fun in the pits while off-bike. I'm sure we have more! . Main difference here being (obviously) what we are doing on the bike, and I'll tell you what, you roll out of hot pit for that first time and run through your first session, you'll be hooked!