So recently, I've made some half decent relpays. HOWEVER, I'm constantly seeing booms, madmans, and breakdancing videos that I couldn't even imagine doing. Now, I have landings and poses down better than the average bear, but does anyone have any universal suggestions to help me be better at making replays? (i.e. the optimum time to extend your knee during a kick, etc.)

There is no real definitive way to get better at replay making.

All I can say is to experiment until you find out the best moves. And in time, you'll gradually get better and better.

Use -30 gravity for more realism ;)

@Wolf - I was hoping I wouldn't get an answer like that, but I can't say I didn't see it coming xD
@Super - I know that much :P

i don't really know if i would consider mine good enough to take advice from, but I just picture the movements before I start editing. I've also learned traction is key.

Hmmm, try relaxing the knees a lot.

One thing I do is to try and replicate people's replays while attempting my own move.
Example: I go to kick uke's crotch and do nuthug's shoryuken for a decap.
If you feel like you need someone to help you out in this, try joining [BLEU] and find a teacher who can help you.

There's a tut here: http://forum.toribash.com/showthread.php?t=189206
It's a bit text heavy but it's definitely worth the read.

There is an index for replay making tutorials,which are useful.
http://forum.toribash.com/showthread.php?t=205809
check this out.You will get some useful tips there.

for madman you better try instagib 1 sided first, and you'll know how to do it in classic/sambo