Original chickens I got (as chicks) were for free fertilizer and bug control, and the eggs thing was a bonus. A really NICE bonus. I wasn't interested in pure layer breeds. One of my original 8 chicks was an EE, so I was thrilled with green eggs when she started to lay.
I like chicken-shaped chickens best, nice hearty breeds. However, I've become enamored of midget chicken-shaped chickens. And I do like the cochins.
I started getting different breeds simply for the variety of breeds. Chicken-shaped breeds, small or large. For some reason, the breeds to which I am attracted turn out not to be white egg layers. Dunno how that happened. The only white egg breed I have is in two laying hens I bought from another BYCer when she was down-sizing her flock: Golden Lakenvelders.
And it turns out I like a very colorful flock and egg basket.
ETA: Correction, I have two Sebright pullets, one Silver, one Golden, but they haven't started laying yet. I got them entirely for the way they look, and discovered they lay white eggs from reading about the breed.