Favourite sequels?

Rocky IV (1985)
Rocky V (1990)
Rambo: First Blood Part II (1985)
Back to the Future Part II (1989)
Beverly Hills Cop II (1987)
The Expendables 2 (2012)
The Empre Strikes Back (1980)
Sleepaway Camp II: Unhappy Campers (1988)
Batman Returns (1992)
Home Alone 2: Lost in New York (1992)
The NeverEnding Story III (1994)
Under Siege 2: Dark Territory (1995)

Spider-Man 2 
Terminator 2 
Aliens
Kung Fu Panda 2
How to Train Your Dragon 2
Godfather Part 2
Star Trek 2: Wrath of Karn
The Dark Knight 
Toy Story 2

Back to the Future Part II
Bill & Ted's Bogus Journey
Next Friday (Friday After Next was shit though)
Star Trek IV: The Voyage Home
Terminator 2
The Raid 2
Blade Runner 2049
The Empire Strikes Back
Aliens (Director's Cut)
Omen II: Damien

For a few Dollars More.

Lee Van Cleef out-cools Clint.

Lol

Terminator 2
Aliens
Back to the Future 2
Halloween 2, 3, 4, 5 and H20
Scream 4
Spider-Man 2
Batman Returns
Fright Night Part II
Airplane 2 -The Sequel!

In no particular order.

Superman 2.
The Dark Knight.
The Dark Knight Rises.
Empire Strikes Back.
Revenge of the Sith.
The Godfather Part 2.
Aliens.
Alien 3.
Blade Runner 2049.
Zula Dawn (its a prequel so i don't know if that counts).
Rocky 2.
Batman Returns.
From Russia with Love (as a sequel to Dr No).
Hell Boy II: The Golden Army.
Terminator II: Judgement Day.
You Only Live Twice (as a sequel to Thunderball).
The Good, The Bad and The Ugly.
Prometheus - Another prequel. Much better than Alien: Resurrection. An interesting exploration of the background of some of the elements of the original Alien film.
Indiana Jones: The Last Crusade. More enjoyable than all of the other films in this franchise.
Casino Royale (2006). Vastly superior to Die Another Day, even down to Madonna's atrocious theme tune for the latter.
X-Men: Days of Future Past.
X-Men: First Class.
Logan.