I keep getting tempted to play the two DLCs because I enjoyed Infinite, but -- and this will sound heretical -- since I never finished Bioshock, I don't know if it will ruin anything. Although, I think I've pretty much had the game spoiled for me over the years anyway. However, I did hear that Part II is a lot better than Part I, but it's also a very different feel with Elizabeth as the playable character.
In regard to movie tickets, ever since I went home for Christmas 2012 and saw what the local theater did during their renovation (after a huge flood), I feel ripped off whenever I buy tickets here. They have these nice, leather, electric-reclining seats, and what really sealed the deal is that I paid $6 (+ an online Fandango fee) for a 4PM showtime! My local theater stops matinee pricing at around 1 PM, and their leather seats feel and look more like normal theater seating that has just been reupholstered with cheap leather. What makes it cringe-worthy is that it costs $12 for matinee. The reason why I like it is because all seating is on a balcony, which means the worst you can get stuck with is being on the far left or far right, but it has assigned seating. So, if you buy your ticket early enough, you can get a good seat.
...and that reminds me that I need to buy my Captain America ticket at a rate of $14 for an 8PM 2D showtime. Eh, most of the front row seats are gone... would rather pay $2 more for 3D and get a front row seat.