I don't know, but now that you've asked, you've made this principle impossible to discover by bothering about whether you should bother.

I found out something odd about myself. I have tried several times to get into 4X games, mostly because I have found them fascinating. But every time I try, I get bored. I don't want to, but I can't seem to help it. I know it may sound odd, but that word might pretty much sum me up.

Lol. He paradox-inated himself.
if you're younger and more filled with energy, games like Europea Universalis are so slow and stand still that they will either put you to sleep or trigger and anxiety rush.

But when you get older and the old grey cells just ain't what they used to be, 4X's games can be played at a much more slower and relaxed pace.

Not every game genre is for every player. :) I love 4X games but I can understand people not enjoying them - have you tried Master of Orion 1 or 2? Those are a touch quicker than your standard Civ game; they have a little less micromanagement and have some different elements which, for me, make the games more enjoyable to play. You might enjoy those.
I dunno I enjoyed Civ and MoO2 when I was younger. I would say the old grey cells were as capable of deep thought then too - to turn your phrasing around. :)

I kinda see it like when you're younger you think faster but less and when you're older you think slower but more.

So when you get as old as me, high speed action games with death metal soundtracks are too much to handle.

Alpha Centauri will always be my personal favorite... great story, balance, atmosphere, ect.

I can handle some slow games. Cryostasis isn't the fastest paced game, after all. It usually only happens with strategy games, and I find it annoying. There are many times when I have wanted to buy one, especially if it's cheap, but I don't because I'm afraid it will just sit on a shelf somewhere. I remember trying the demo for Sins of a Solar Empire once, and as much as I wanted to like it, it just didn't work out. The concept sounded awesome, but I just couldn't do it. I don't know, maybe when I get older...