I did that, it's fun but I gave it up for moderation, moderation is pretty easy now that I'm a bit older and married. When I did that I was messing & racing, and to occupy myself I began waking up at 5am, commuting in & working out at the YMCA as soon as it opened, followed by laps in the pool, then a second breakfast of smoothies with a starchy bread and juice, then off to work where I rode all day without safety meetings, healthy lunch, then work, then commute home, but not the 6 mile route I'd usually favoured, instead I'd take different routes on large arterials, stretching my commute in large loops to anywhere from 15-20 miles. Training rides on the weekend, road and off-road for variety, off-road races when in season.
My health, which was fine, improved. My diet, which was huge, expanded. My riding didn't particularly improve but naturally my endurance got a boost and there was a slight boost to sprinting. I gained 15 pounds, a lot for a little guy like me, but stayed at my usual next to 0 BFI(not anymore!).
It was great, but I found myself womanless after a short time, alll that riding and an extreme lack of partying because I wasn't sure how I'd do trying to have fun at parties I'd been going better prepared to for years.
It's great for the body and mind, but in the end moderation won out, which is better than the party I lived before going on the health/body kick.