I had to re-watch the first OVA, because it'd been so long that I'd forgotten the story.
Granny, with her physics-defying curve ball...er rocket stole the show.
Also, I'm going to be the voice of dissent and say I didn't think much of the actual games. I thought the original anime had far more story/characterization than the game it was based on. I actually found the game rather bland, and am not all that surprised it didn't do well. VC II had a far worse story, though much more characterization. Can't say anything about VC III, though I'm enjoying the story shown in the OVA.
It's pretty rare where I'd recommend an anime over the game franchise it's based on, but this is one of those cases.