Maybe it's just that my brain has taken a holiday without telling me, because I'm also having difficulty answering the question as to which 10 fictional characters I'd do (if plied with sufficient booze and/or mind-altering drugs). My list, after much soul-searching, comes to six:
1) Mark Renton
2) Mr. Darcy
3) Ninth Doctor
5) Robin, The Hooded Man (Michael Praed-version)
I've listed them here in no particular order, although there's little or no doubt that with my current level of obsession and given half a chance (no need for booze or drugs), I would jump the good Doctor's bones. My fascination for Mr. Darcy and Boromir stems from the books more than the box or the silver screen, although I'd be a fool to deny the obvious charms of Messrs. Bean and Firth. Michael Praed's Robin Hood has the distinction of having been the first TV hero I crushed on, and Spike, of course, was the penultimate. And Mark Renton would have to have been clean for a while, or things would get totally embarrassing.
And wow! I just thought of a number 8, 9 and 10 - but really, they're one and the same: Indiana Jones/John Book/Han Solo. Maybe I can be forgiven for adding an extra name to the list: Rick O'Connell. Why? Because he's very much cast from the same mould as Indy; and besides, he's a total dreamboat.