Marth's Aerials?

[Jink8]

Which ones autocancel? Out of short-hop and out of full-hop.

 

[A_Reverie]

http://smashboards.com/threads/complete-marth-hitboxes-and-frame-data.285324/

All questions regarding frame data can be answered from here.

 

[Hunybear]

All short hop aerials can auto cancel except Dair.

 

[Jink8]

All short hop aerials can auto cancel except Dair.

so what moves should I L-Cancel?

 

[Hunybear]

so what moves should I L-Cancel?

lol All of them.
Marth really only Auto cancels when he uses raising ariels. Dispite them having there uses, SHFFL ariels have much broader applications.
Basicly L-cancel whenever you are going to land while still in you ariel animation. More often then not you should be.

 

[gmBottles]

so what moves should I L-Cancel?

If you are landing while using a move, L cancel. Always.