Dana Scully - bright, exciting career, carries a gun (legally), deals with the supernatural and has a partner that is to die for. What could be better?
Hey, another Stainless Steel Rat fan! 
Jim DiGriz rocks my socks.
Still rather be Q though… actually, I’d be Lady Q (I think she shows up in Voyager.)
Oh, come on! No one picked the galaxy’s coolest character…
Mr. Spock!
Also on the list:
Captain Kirk
Captain Picard
Zaphod Beeblebrox, President of the Galaxy
Garak from ST:DS9
Darth Vader
Emperor Palpatine
Wow, do I like that one!
Another Harrison fan.
From novels I’d be Slippery Jim DeGriz aka “The Stainless Steel Rat”. Although I still hate Esperanto.
From comic books I’d be Ritchie Rich if he just had a normal head.
From movies I’d be Flynt from “Our Man Flynt”.
From TV I’d be James Tiberius Kirk. He got to bag the green chick.
No - even better - Anne Beddingfeld. The Man in the Brown Suit.
Gets to go on a cruise, become a journalist, solve a murder mystery, and fall in love with the sexiest guy ever, then live in the middle of the jungle with him.
How could I forget my second choice? Imagine being Notch Johnson! The world’s greatest lifeguard on the beautiful Malibu Adjacent! And who knows, maybe someday, I can have a body like his.
Several possibles (all from books):[list=1]
[li](Related to my username) - Dr. Cherijo Greyveil from the Stardoc books by SL Viehl[/li][li](if I was male) - Lazarus Long from numerous books by Heinlein[/li][li]Sparta from the Venus Prime books by Paul Preuss/Arthur C. Clarke[/li][li]Claire Fraser from the Outlander series by Diana Gabaldon[/li][/list=1]