I don't know, I guess I like sci-fi and ridiculousness. Maybe the Bat titles were too street-level for me. But Batman vs Frankenstein, or Dracula, or Jack the Ripper? Bruce Wayne becomes Green Lantern, Kal-El becomes Batman? I liked it. I guess it was DC's version of What If, a title which ironically I never read.

I don't know if they were worth more than a single read though. If I were to go back now, I'd probably prefer to read the main Bat titles than a bunch of one-shots that didn't contribute to the main titles. But at the time it's what I liked.