The peak of tech excitement in my entire life was when a friend brought a copy of Computer Shopper to school, and the cover proclaimed a new 90Mhz 486!! No other tech ever blew my mind like that again.
I really followed computer evolution during the GHz wars. Watching a CPU go from 300Mhz being fast to 2GHz being fast was amazing. Then watching as AMD pulled 1.8GHz parts and kicked the pants off of Intel's 2.5GHz parts was equally incredible to young me.
Now I see generation to generation pushing 5->10% improvements and mostly go "meh".