Just do some growls.
Do some growls that create transients (kind of like when you say "aaaaaahhhhh" but in a really slow almost clicking sound).
Then do the gamut of emotions so you have them in case you do some animated movie in the future that you need curious or whimpering or scared emotions for a monster...
Do some laughing too just for the hell of it.
Do some screams and roars like a charging soldier.
"Get back here!!"
"I'll kill you!!"
I don't know - think of wild lines for a video game you might do in the future.
Remember to record them at 192K so you can pitch and process at the utmost.
BUT MOST OF ALL!!!!
If you have a phlegmy throat and it affects your breathing, record yourself breathing - some really really good dirty breathing might be a cool texture.