Well, then, since you guys are being pretty much all absolute loving handicaps right now, and completely ignore the OP's question just so you can have your loving queer little fight, I'll answer his question.
Most of the Brony community watches the show because we find it to be rather adorable, and we [mostly] enjoy adorable things like such. The show also has fairly good character development for a 7 year old girl's show, and is quite interesting to watch and attempt to identify references to other things, which are shown very often.
And the other like 15% of the community... we don't talk about them. They watch the show "for the plot" and find cartoon ponies to be loveually attractive. They are made up of primarily trolls, perverts, and others of the sort. They also make about 90% of all research involving MLP, which is something I do hope you shall never have to see.
But yeah, there you go.