Again, I'll be the one to clarify an approach:
Many of these movies are nothing to be guilty about.
Sure, they might not be cinema artistry at their best, but guess what? Not many movies worth watching are.
Many of them are classic examples of the best the genres produce, or are classic genre-breaking movies.
For example;
* Star Wars ep 2 was seen and enjoyed by millions of people - it's hardly a guilty pleasure, or anything to be ashamed about liking.
* Starship Troopers is an incredibly-misunderstood movie. Simultaneously a great action flick (war movie) with amazing effects while at the same time a statement about Fascism and Patriotism-taken-too-far.
* Big Trouble in Little China is a classic - no guiltyness there.
* Same with Army of Darkness.
* Real Genius is a classic 80's comedy. Top Secret! is a Zucker film, and close to a classic. You might as well say that Airplane! is a guilty pleasure, when it is far from guilty.
* They Live is a good 80's sci-fi film.
* Willow is one of the most loved fantasy films of all time.
*UHF is getting close to something you'd have to feel guilty about, but in my opinion, it's a classic piece of comedy. I don't see anyone feeling guilty about liking Dumb and Dumber of There's sOmething About MAry, and those are just as questionable of niche-comedys.
Some good examples of Gulty Pleasure movies mentioned are things like BeastMaster, Plan 9 form Outer Space, the Hulk, etc.
My examples of guilty pleasures are:
Oscar - I just love play-type fast-talking comedy movies. I put this up there with Clue.
Point Break - whenever this is on, I cannot turn it off.
Disclosure Same thing here.
I'd think some other Guilty Pleasures for some people might include Captain Ron, Overboard, Innerspace (seeing a theme here?

), Best of Times, Popeye, LXG, Tomb Raider, etc.
A word of advice - don't put very much weight on what "internet people" say - I have learned that they are NOT indicative of the general public, nor the prevailing opinion of films.
While it may be common to hear things like "Gladiator was a terribly written, acted, and directed piece of trash" on the internet, in real life most people think it's a great film.