Ben 10

• All of Ben's alien forms have four (or fewer) fingers. Many cartoon characters, notably the funny-animal kind like Felix the Cat and Bugs Bunny were designed with four fingers because it was simpler to animate.
• Ben's eyebrows keep changing from black to brown, which actually turned into a running gag in the whole series.
• The Megawhatts punking everyone.
• Hot dog carts being knocked over.
• Ben's new alien form always falling on his back, such as Cannonbolt.
• Whenever Ben says something about the past, Grandpa Max gets shocked.
• Gwen saying to Ben, "You? A..."
• Ultimos constantly mentioning the Galactic Code.
• Ben stumbling about in his superhero costume.
• Synaptak doing things to get Tini to like him.
• Charmcaster saying, "Yes, Uncle." Obeying Hex's commands.
• Gwen talking about not being accepted into Bancroft Academy at unreasonable times.
• Ben constantly requesting Gwen to tell him her famous "I told you so" speech for messing around with the Omnitrix - to no avail.
• Grandpa Max trying to find out who's who.
• Ben and Gwen questioning the instructions.
• Ben using his aliens to do work.
• Ben wanting to go to the Sumo Slammer Convention.
• Ben talking about taking a bath.
• Grandpa Max using a high-tech device and saying "Plumber's standard issue."
• Gwen trying out a spell from Charmcaster's spellbook and it results in something unexpected.
• Ben stabbing his foot on a rock, Gwen laughing, Ben saying it's not funny and Gwen saying it's something funnier.
• Someone saying "Who knew?"
• Principal White looking for a particular key in his giant key-chain.
• Clancy is once again frozen the second time in the series.
• The Omnitrix would time out in the middle of a battle or in a bad situation.
• Ben and Gwen would argue about something.
• People don't know who the alien heros on the news are.
• Ben would get in trouble in most episodes.
• Most villians would call Ben, by his last name, Tennyson instead of calling his first name. Dr. Animo first called him by his first name in Ben 10 vs. The Negative Ten (2).
• Whenever Ben wants to turn into Fourarms, or any other alien form, the Omnitrix turns him into a different form, which results with him complaining about that form.

Ben 10: Alien Force

• In the show, the thick white stripe that comes down from his left shoulder is on his right shoulder in most posters. This has been occuring for a long time.
• The two stripes on Ben's sleeve somehow travel from one sleeve to another.
• The episodes occurs mainly during the evening, the first time this didn't happen was in "The Gauntlet", which took place mainly in the afternoon.