If so, I'm in projektir's camp. I often feel better after exercising, but sometimes I feel worse. Also, I don't necessarily see a clear day-to-day improvement.
There are definite health benefits to exercise for most people [0], but I don't think subjectively feeling better is necessarily as widespread as some exercise proponents think.
[0]: Video summary of the evidence for exercise: https://www.youtube.com/watch?v=SFBBjynBpSw
I probably feel somewhat better after exercising in the long-run. But that's about it, somewhat. And most of it is extrinsic - not feeling winded is nice, having a lowered heart rate is nice. Other things have contributed a lot more to improving my general well-being than exercise.
I drink 32 oz of water during the day before exercise and then I try to drink the same amount after. I think the question of how much raw water one should drink per day is kind of disputed right now, though.