Broken Base: The series as a whole is in one of its own. Given it has been going on strong for years it has a clearly beloved fanbase still supporting it year after year. It also has some detractors who wonder why it is still going on without any signs of ending. Similar thoughts are echoed on its sibling entity the Tom and Jerry film series, and is a very solid reason why Hanna-Barbera's IPs are still considered divisive to this day.
Crystal from Alien Invaders, and Simone & Lena from Zombie Island are all well-liked despite only appearing in one film each.
Fan-Preferred Couple: Shaggy and Crystal, thanks to Alien Invaders. To a lesser extent, Scooby and Amber as well.
First Installment Wins: Zombie Island is considered the best movie in the series and one of the best Scooby-Doo animations ever by some of the fans.
Growing the Beard: This trope is brought up on some aspects of the series as it has changed style several times. Some would consider the first four movies a Growing the Beard for the Scooby Doo franchise as a whole. While starting with Abracadabra Doo some feel The film series started putting more focus on the characters for the better compared to the previous section.