I'm going to stick-up for my man Danny Boyle. Is the ending of 28 Days Later different from the rest of the movie? Yes, definitely. Same with Sunshine? Absolutely. Is the ending to Slumdog Millionaire really sentimental and predictable? You betcha. But I think the endings of all three movies work. Just because things get different (or in the case of Slumdog, "cutesy") doesn't mean they are bad if they are executed well, and I think the endings of all three of these movies are executed almost perfectly.