This is my opinion on each server on Infinite Flight. Also feel free to give me yours as well :)
Casual Server- This is where a lot of craziness can happen as a lot on new pro subscribers are trying out all the different aircraft and the rules of of IF( 250kts below FL100, max ground speed 35kts, etc). I remember being the one that would be professional when Emirates A380s and KLM 787 would run right through you. Then f22 raptors flyby every 7 seconds. However this is where I would almost never complete a flight as I took off, got bored and had almost no landings.
Training Server- Ahh the training server! This is where I spent most of my flights last summer even though I was grade three. This is where ATC can be open by any grade 2 or higher pilot without any training but this leads to a lot of craziness. Some things that many might know is approach control being almost pointless because most controllers don’t know how to vector other aircraft and there are a lot of people who don’t follow the controllers instructions. Now there are some pretty good controllers on this server though but for the most part, ground is the one that really has been taken seriously. Then we have people disregarding everything the tower tells them. So please be patient with your controller and others around you. :)
Expert Server- This is the big leagues in IF where ATC access is only permitted to those who have proper training and practice. Also to the pilots who have achieved grade 3 are allowed. While this is not a perfect server where everyone knows exactly what to do or what to say to ATC( Grade does not always represent skill and knowledge), this is where it gets as close as it gets to real aviation. This is where I fly pretty much 100% of my flights and its really fun to go to a very busy FNF at Atlanta or London and get vectored by ATC on real life procedures. However there are times when professional isn’t quite the word in some cases resulting in ghosting for any number of reasons but it is in effort to keep the expert server for those who want the best experience. Note that I have received a couple violations and one ghost and I know the feeling so lets try to keep this a professional and safe flight sim
Congrats you have reached the end of this and that deserves a cookie!