I'll start. 
 
1. Doors slam in your face.

2. Giant Bomb hypes stuff beyond belief, so when you try the demo you realize it´s not for you.

Better late than never.. 
 
3. Spectres were clearly not trained in the use of blindfire.

4. Making a game with a horrible, non tension filled (in my play through) ending with a terrible boss and absolutely no meaningful connections to the first game besides like 2 passing conversations, and a shooting system that I didn't find interesting can still be insanely fun if you are able to write characters as good as Mordin. Yeah I have a real love.hate thing going on with this game.

This thread didn't exist already? Anyway:
 
5. Being resurrected comes with a free optional face lift and sex change.

Can someone please explain to me why so many of these threads need to exist?

6.When on board of an exploding ship, take your time to carefully answer your fiancee's question.

" Can someone please explain to me why so many of these threads need to exist? "

6. If someone tells you "Hey if you bang this chick you're gonna die." and then You bang her. You will die.

There are no gay men in space, only lesbians

8. Mass Effect isn't about the action scenes and people need to learn this.

9. Don't drink something a batarian gives you.

10. If you hit on your secretary, she'll surely show up in red latex and dance for you.

11. Any woman will sleep with you, but the special ones will feed your fish.

12. The best way to end any conversation with a chatty person is always to shoot them or kick them out a window.