a little laugh.

"haha" - that's funny, but i'm not actually laughing.

"HA" - I just cackled.

"hahahaha" - that's funny and I'm actually laughing on the inside.

"HAHAHAAHHA" - this is so funny that I'm risking looking like a fool in front of coworkers.

"lol" - is dead to me. The expression shouldn't exist.

"jajajajaja" - spanish laughter, I still remember that.