I loved Bo Jackson Baseball. It was the NES version of what TG16's TV SPORTS Baseball would have been (cinemaware's amiga baseball game). It was fun and had great graphics considering it was NES.
You guys just mentioned Bo Jackson baseball and the menu song is playing in my head. I also remember the (exaggerated) umpire calls. T rike! you're out!
The NES was home to many memorable baseball games. Bases Loaded 2 is my all time favorite (yup, it's true), but I also have fond memories of Bo Jackson, the RBI series and Bad News Baseball, especially when playing against someone else.