Best Movies With Sequels

[AJ]

What do you think are actual good movies that where backed up with good sequels? Wether they had one or 2 or 15 more movies made to continue the first. What are soem of the worst done?

I think some of the best where the Lethal Weapon series. Probably one of the best for continuing the charators and not trying to push a new storyline or actors as the feature. In that same area I also though Beverly Hills Cop movies was a great set as well.