Who is that Champion you love but you suck playing them?

Mine is . I love him, I really do, but I have never been able to play him like I sometimes see teammates or enemies playing him and destroying everyone. I was stubbornly playing him to the point that last season i used him in most of my classification matches so I ended up Bronzie 3. It took me months playing with my actual main to rank up to silver 2.

Another one I like but I don't buy because I suck hard every time I try him when he is in the rotation is . Damn I am so fucking bad it hurts xD

Who is yours?