How can it be the best part? That's like saying the beat part of the roller coaster is getting out of the coaster after the thrill of the ride.
She's sucked your dick. Made you cum. What difference does it make what she does after the fact? And how does it make it more enjoyable?
The only positive about swallowing, IMO, is no mess. My gf swallowing certainly isn't more enjoyable than the entire blowjob. WTF am I missing here?
Well to each his own, I suppose... :dunno: