Re: Plan 9 from Outer Space
I'd rather watch Plan 9 than, say, the miserable, worthless mess that is Transformers, any day.
Transformers versus Battlefield Earth? Tough call. Transformers is probably a less awful film by most metrics; but I can imagine a world where a Transformers film isn't completely terrible, whereas one where a BE film is anything but dreck is pure fantasy, so Transformers loses points for opportunity squandered.
All that said, there are plenty of films - ones with theatrical releases and everything - that are worse than Battlefield Earth, in terms of the sheer dreariness of watching them. Any number were featured on MST3K, for example, Just dull, poorly-made movies with lousy plots, scripts, acting, direction, and production. They just don't show up in this sort of exercise because they're too obscure and pointless.