I have not done the 1001 to drink before you die, but I have rated more than 1000 beers on RateBeer. :)
I have many favourites, but a favourite depends on so many things! Westvletern 8 is one of the best beers I have ever had, but I would not like to drink it while mowing the lawn! Snow and Bud are great for quenching a thirst, but not something I would drink with good meal.
London Pride, Stone Ruination, Lagunitas Hop Stoopid, Dogfish Head 60, 90, Midas Touch. Weihnstephaner Weiss, Pilsner Urquell, Duvel, Cockpit Crazy Diamond, Windhoek Light, Badger Golden Glory... The list just continues.
Use sites like Ratebeer and BeerAdvocate to see what others think of the beers.
And sometimes the best beer is the one in front of you. :D