Insomnia and working hours don't mix

I may not be "Certified Nuts", but I'm definitely "Certified Insomniac". 
I'm letting you all in on a little secret to my "success" as an undergrad (I'm using success very loosely because I didn't have the best grades, but I sure managed to accomplish A LOT of shit): when you all were sleeping between the hours of 3AM and 5AM, most nights I was wide awake, taking advantage of the "extra" hours and doing a lot of the homework that I wasn't able to finish during "normal hours". 
I was able to ride the waking pony for the last 2 years of my Ag degree and all through Eng.   Crazy?  Very. 
I didn't bother seeing a Doc about it then because I was able to cope very well.  I did have the odd early evening nap to compensate, but I seemed to manage just fine. 
When I hit the "Real World" though, it started to catch up with me.  Something about being fully conscious between 7 and 6 really got to my system.  For the last 2 years, I've had pretty much a constant stream of Gravol or Melatonin going through my system.  I couldn't take anything much stronger because of the whole "operating heavy equipment" thing. 
Now that I'm back in school, I've killed the Gravol habit and have gone back to really strange working hours.  I'll typically have a quick "nap" between midnight and 3AM, wake up between 3 and 4, and have another quick "nap" between 4AM and 6AM, sometimes I can get away with sleeping until 7 if I don't have to be on campus right away.  Sometimes, if I'm lucky, I can catch a quick snooze as soon as I get home from school, but that usually doesn't happen (something about an excited puppy who's really, REALLY excited to see me). 
Although I could try and use the  crazy waking schedule to my advantage again, I'm having a little bit of trouble trying to make it swing.  Afternoon naps are hard to come by, even when I'm a student again. 
Although I'm rarely exhausted, I'm rarely 100% alert either.  It's almost like I'm in constant state of "Zombie".....BRRAAAIIIIIIIINSSSS!
I'm wondering if the 2 years of normal hours has taken away my Insomnia Super-Power.  That would make me sad.  Can't say that having insomnia would be the first thing that I'd chose if I could pick a super-power, but I was able to take advantage of it while I could. 
Maybe this is the World's way of making me trade it in.  I wonder what my new super-power is going to be??