Honestly, I never got into them. I didn't/don't buy into the emotion of the music, found Gerard's vocals grating at times and nothing they did ever clicked with me personally. It doesn't help that their songs continue to be overplayed in public places, especially Teenagers. They were a daring band, I'll give them that, with their take on the "rock opera" album styles, and even with their earlier more punky stuff they stood out from the crowd. In summary, me not liking them definitely says more about me than it does them. They are a cool band to be a fan of.
I am a fan of Modest Mouse, Death Cab for Cutie, Postal Service, Taking Back Sunday, Brand New, Radiohead, American Football etc. , all bands which aren't entirely dissimilar from MCR, but MCR never did it for me.