Wow with all due respect your hangover isn't the normal hangover most people would describe. Most would say they can't function the next day, feel dehydrated with possible nausea and a banging headache. Is it possible that your body has developed some sort of tolerance towards alcohol therefore you are not feeling the effects of a so called hangover as extremely as others might feel them?

You feel clear headed because your mind was probably buzzing the night before whilst you were alcohol induced. You feel calmer and relaxed because if you were that drunk the night before the synapsis in your brain would have been going haywire the night before.

You have a perspective on things in your life because whilst you were drunk it helped you contemplate how "wonderful" your future is without disinhibition.

Don't take this the wrong way but the way you're going about this is not healthy. You know you can't forever rely on alcohol to achieve this sense of self perceived well being. What happens when the alcohol stops. Would you fall apart.

In a nutshell you need to find different mechanisms, possibly through therapy in order to feel these feelings, without alcohol the night before.

Be well.