The Ending (SPOILERS!)
Some nitpicky stuff about the plot... (SPOILERS!)
At first I didn't mind that the core ideas of Bioshock Infinite were so similar to the original Bioshock ("how about we put it in the sky this time?") because I thought there would be a new great story and characters... unfortunately I don't feel that either of these lived up to the original. Columbia doesn't quite carry the same intriguing backstory that Rapture did, we don't really learn about the warped ideals that shaped Comstock's villainy like we did with Ryan (even when we get the chance, it just sorta tells us "after this event he becomes evil", and the game's big twist isn't quite as nuanced as it was in the original. Like I said, certainly not a bad game, but definitely not what I thought it would be either. Maybe it's just impossible to live up to the expectations of the original.