Dirk Nowitzki will begin his 19th training camp with the Mavericks on Monday and for the 19th consecutive time, he's excited about the possibilities.He'd be the first to tell you that, in 18 of those years, the excitement died out before he would have liked.Nevertheless, what is life without hopes and dreams, and the Mavericks' legend is eager to see what this new version of the Mavericks is going to look like.