I really enjoy seeing Viktor every game.
Hes so much fun to play against, always having to dodge that long ass laser is really a nice little minigame, being able to go to the toilet or get some water while you wait for his slow field to disapear gives the game some much needed downtime and that he basicly just have to look at a minion wave no matter how big to make them all die ist super awesome, it gives you the challenge of having to tank the tower yourself.
Having a 9s CD long range AoE spell that deals 350 +98%AP damage is also super healthy and awesome to play against, its so much risk reward, get hit and die or dodge and get the reward to wait 9 seconds, cause he was way out of your range anyway.
And his Ultimate is always a joy, so many nice lights, I wish it wouldnt automaticly turn your screen grey once casted...
Seriously, I love that he is picked in nearly every game, hes so much fun!