This has been almost exactly my experience: right around the time I started sleeping soundly, jumping out of bed in the mornings, and feeling shockingly alert (most shocking is that dull mental state I'd apparently grown used to over the years) is when I found my libido coming back, just as welcome and sudden as these other great developments. Spot-on with the pushups and other manly things, ha -- I felt totally drained halfway through my workouts before; now I just feel energized and hungry for more (I imagine this will only help with proper hormonal balance in the future). Oh, and I am definitely more given to flirting as well.
I'm only just getting into my mid-20s, but I haven't felt like this since I was a teen. No more glutenings for me, that's for sure!