My wife and I had one of those "perfect" rides last week after work on our tandem. It was only an hour, but traffic was very light, the weather was warm but not hot, sunny but late afternoon so the wooded areas we rode through looked dark and mysterious, we did a climb that I'd previously been afraid to try on the tandem and it wasn't bad at all, we worked hard-ish but not really hard, etc. It was one of those rides where, when we swung off the bike, we looked at each other and said "That was REALLY nice".