I'm just curious as to what missions people like so far, and maybe why they're everyone's favourites? If you haven't finished the game, that's fine, just whatever mission has been your favourite so far. Side missions (like Longinus' and Hurk's) count as missions also, so you can write those as answers if you want.
I think my favourite mission so far would be Advanced Chemistry, which I won't spoil, but I just really liked that mission. The music playing was really cool. I'm not sure about any other missions, the one where you confront Paul was alright but it got annoying pretty quickly.
Also, try not to spoil anything for people who might have not finished the game yet.