Oh, I don't mind a little humor, or even profanity in a Hitman game. A good example with the profanity would be in BM 'Death of a Showman' (if I recall, that was the only level with it.) now look at that compared to Absolution.....
Even other Hitman games had it, but it wasn't nearly as often as with Absolution or even the current. That's what I meant by it started to feel immature after BM, Which also goes for the "humor" as well.
Contracts for example had good humor IMO. For example; Fabians little visit to the bathroom after you put the laxatives in his soup. Now If you were able to do that in EVERY single level, it would loose it's appeal. Not all, but most of Hitmans past humor came from EE. They were a lot more subtle with it.
Now it's like everything gets forcefully thrown at you like "oh, oh look listen to this, wasn't that funny,? Now watch this! Ohh, look what he says now if you you do this! Watch here's another one, look! Hahaha."
It just gets annoying sometimes, where everything HAS to be "funny" just walking by someone they have to say some dull remark. I definitely agree, how you said, past games really did handle it better.