If they’re the same, state as such. Otherwise, two phrases should do nicely. 
The Autobiography of Chastain86
Line Up For Your Pitting. This Could Take Awhile.
Here Lies Chastain86
You Say Goodbye, and I Say Hello.
Back when I was teaching, a student wrote the following on an end-of-term evaluation of me:
She drinks a lot of Diet Coke, and sometimes her jokes are really weird.
Change “Diet Coke” to “Diet Dr Pepper” and change it to past tense, and I think it’s a dandy epitaph.
“Here lies Crayons… Meh…”
If you know what you’re doing, it’s not an adventure.
Autobiography: I Was, Therefore I Am
Tombstone epitaph: A Grave Mistake (I plan on cremation)
Autobiagraphy: “Nothing to see here - four hundred pages of nothing”
Epitaph: I told you I was sick. (i’m sure I read that somewhere)
Gnat Polishing for Fun and Profit
“Hey, Stupid - you’re standing on my crotch!”
Autobiography: Everything In Moderation
Epitaph: *Too young to die, too Jewish to be born again. * ;j
Autobiography: Will SOMEBODY please come and pick up the remains!!?
Epitaph: Who the F**k?
Autobiography: I should do this more often.
Epitaph: Tried to Shit, Only Farted
Autobiography: Breaking Through the Shell: a life’s journey
Epitaph: I’m not sure.
With all due respect, shouldn’t that be Coldfire’s bio title?
Autobiography:
How the Hell Did that Happen?
Epitath:
He has a life, and it killed him.
Autobiography: Just Shut Up and Do It, OK?
Tombstone: Here lies Nametag – no longer what he was
Autobiography: “She Can’t be Serious…Can She?”
Carving on the tree that will be placed on my ashes: “Gimme my prize…I’m outta here”
Gravestone: Hey, you, someday you’re gonna be dead an in a grave just like me. Probably sooner than you think too. Pleasant dreams.
Autobiography: Exhausted, or One Woman’s Victory over Chronic Disease
Epitaph: Overoptimistic much?
Autobiography : “Insert Obscure But Witty Movie Reference Here”
Epitaph :
Tombstone!
Starring : CandidGamera
A Yahweh Production
Autobiography: Obsessing over minutia (Now with 30% more minutia!)
Epitaph: You mean that’s it?
Autobiography: “Mastering the Art of Boredome”
Tombstone: “Yeah, but you see the other guy…”