2K definitely, as a whole, is not the greatest sports developer out there. As mentioned, their baseball and hockey efforts have always been subpar, and continue to be. At best, they are fun side diversions, but do not belong with the big boys. Their basketball titles used to be on the same level as their football titles, but over the last several years, that has dropped off too. I do not know how they would do with an NFL license today, but I still would like to find out. They really gave electronic football a shot in the pants with NFL 2K and continued to put good, to great, products out until 2K5. I would hope if given the opportunity, they could capture that magic again.
I agree with others, like Matt Young, that say that Madden isn't necessarily always bad. It has some years where it is a solid title..then it can lapse into some mediocre years as well. I personally did not care for 2010 however. I haven't tried 2011 yet, but I hear some decent things about it, so I might give it a go sometime. I still am gaming on NCAA 2010 to get my football fix in and still have a decent time with it.