I have a few I tend to use.

She is just so goddamn happy!

"A scream, loud and long, like a soul puked up from Hell, like a baby born without any skin..."

Give them a Spartan welcome.

Pip pip, cheerio, righto guv'nor!

Go Go Gadget Awesome!

Awwwww...

"Welcome back, Count."

Dead Gunfighters.

BLOOD FOR THE BLOOD GOD!!!

It is better to die for the Emperor than live for yourself.