Some of them are awful and boring; some are fascinating; same as with new movies. It all depends upon your personal taste in films.

Depends on the old movie. And depends how old you are talking about. It's a very ignorant vague generalization though

Many old movies are great...

Not at all. The ones in black and white are the best. "The Third Man" had a great plot, but the soundtrack ruins it. JMO

Not boring at all.

NAH