Sure he's noncommittal in person. But for more than two decades, he's done what he wanted to do, resolutely pursuing one of the most personal and idiosyncratic careers in rock. He's delivered at least one monument of a record and enough good songs to fill several others. Along the way, he helped both invent punk and make room for the kind of bands that are more interested in honesty and pure, undiluted emotion than rock's endless posturing. And it's not a bad legacy. For Jonathan Richman, the whole thing has been a lot of, well, fun.