Katarina or Blitz or Ahri or Irelia?
Advice Welcomed.
Advice Welcomed.
Kat's rumored to be getting nerfed/reworked...Ahri's in the middle of her rework and getting nerfed a bit. Blitz and Irelia are both fairly stable. Personally...I love Blitz, Ahri, and Irelia...never been that great at Kat. Plus she's countered hard...and I mean HARD by a lot of matchups and team comps.
Based on pure fun...I'd go Blitz or Ahri....though you don't have to look further then what role you enjoy playing. Between Blitz, Ahri, and Irelia you have three roles...all three of which are good at that given role. So...what do you enjoy more...top, mid, or support?
is the best champion in the game.
is the most fun champion in this game.
looks nice and has many nice looking skins.
With that out of the way, you will eventually want all of them. I find all of them fun or at least ok to play.
Do you wanna assassinate stuff ? 
Do you wanna wave clear and set up nifty picks on enemy champions 
Do you wanna do great damage while being really tanky ?
Do you desire to support your team while being really tanky and trollish ! 