I crossed that Boston Finish line 2 years ago.
Had the time of my life there, even with a terrible run (stomach bug). Even with the stomach issues, I had a great time. My qualifying time was a 3:27 and my Big Boston marathon time was a disappointing 4:15. I have some unfinished business there. I am hoping to qualify on May 2ND when I run the Flying Pig marathon. This is the first time I have really said this out loud, because I haven't wanted to jinx it. If I don't BQ in Cincy, then I will sometime this year. I know I have it in me again. I would just love to get it out of the way, so my other marathons can be a bit more enjoyable.
So Congrats and good luck to all running Heartbreak hill. Enjoy your experience.