I definitely don't feel as tired through the day if I am diving 4-6 dives a day over a period of a week or two (normal for me on a trip) using Nitrox, and I am more likely to do more diving. Maybe it's a placebo, maybe it's not. I can easily look back at my logs where we had unlimited nitrox on a trip vs nitrox not available and easily see that we did at least one dive more per day and usually two or three more per day.
I don't go on trips to do the typical two tank morning dives then spend the rest of the day and evening bellied up to the bar & buffet drinking and eating the day away -- not that there's anything wrong with that, it's just not my thing.
I don't go on trips to do the typical two tank morning dives then spend the rest of the day and evening bellied up to the bar & buffet drinking and eating the day away -- not that there's anything wrong with that, it's just not my thing.