What is your favorite type of input buffer?

[cyanprime]

Okay, so I've noticed a few different types of input buffers, and want to know what one I should focus on implementing in my fighting game input library - BlitzPad - if I want it to be useful to the majority.

Here are the kinds of buffers I've noticed. (C is a button input, and numbers are directions)

1) input matches the end of the buffer
You could do 6626236C and throw a hadoken.

2) input match anywhere in the buffer in the proper order (within reason)
You could do 2233996C and throw a hadoken.

3) exact.
you must put in 236C to throw a hadoken. 2366C, or 2336C  would not work.

I perfer 2 as I can put in 6321478C and do a jumping 214C low to the ground.