Warhammer 4e was the first miniature wargame I had, getting it at the age of 13 as my Christmas present, IIRC. I fondly remember that time.
I loved building an army, pouring over the magick cards to bolster heroes, finding the right combination of useful effect and available points cost. This plays into this edition being known as 'HeroHammer', where kitted out to the max heroes duelled, often deciding the battle. I liked it.
The magic cards I even ported to my homegrown Warhammer version (see Warfork Fantasy Battles), which I use to play these days.