[_____V_____]

Well it has always been common to make a sequel once the original has a fair amount of commerical or critical success. But thinking back, there have been plenty which have proven to be actually better than the original.

In my opinion, Spiderman 2 was better than 1.

Same goes for X-Men 2.

Everyone knows about Aliens.

Empire Strikes Back is regarded as the best one in the Star Wars franchise.

Superman II was way better than 1.

Toy Story 2 was another which vastly improved over part 1.

Blade 2 was actually more neat than 1.

I would regard Chronicles of Riddick on par with Pitch Black though.

Evil Dead 2 is regarded as a better movie than ED1.

Jason was actually liked a lot more in pts 6, 9 and Jason X than pt.1 or 2.

Terminator 2 is a vast improvement over the original Terminator of the 80s...


These are some which come to mind (I know I am missing more).
Is it because a sequel is made after examining the flaws of the original, and refined and made better with more cash and using better technology?
Or is it because it tends to tie up the loose ends left by the original?
Maybe better marketing?
Maybe some other reason...

Whats your say on this?