There's a certain feeling that goes with this.
Now, my three top played champions are Shaco, Kha'Zix, and Elise (partially dmg not full tank). I don't go tank TOO often.
But there's just this warm feeling knowing that you saved all that damage from hitting your allies. It's like the spirit of Braum is there in game, patting you on the shoulder as you flash in front of a final Jhin ultimate shot that's going to kill your ADC. Every role has their own moments, and going out and playing those different roles more really makes the game fun.
So many people are caught up in balance, or being angry at Riot, or SoloQ, or are just angry in general. People need to take a step back and enjoy the game more often.
Good luck on the Rift all.