Sounds like a happy content little man to me. Like LZ pointed out it's babies who have learnt not to cry out that can be distressed without vocalising it.

I think some babies just don't like falling asleep on the boob as much as others. I could feed #1 to sleep every time, but #2 is not as fussed about it. It has no effect on our BF'ing, she still loves to feed, just not when she's ready for sleep.