No trick question Niels.
As you know waht you are talking about when it comes to physics I wondered what mods you had driven and waht you thought of them.
The rfactor comments isn't usually the best place to get reasoned unbiased opinions on mods.
Lot's of mods are enjoyable, however I have always been curious which mods have the most accurate physics (within reason) from the point of view of someone that understands it.
Often I find that people rate mods on rfactorcentral based on who the mod team is and weather it is based on their favourite motorsport.