All things Kerbal and more!
What is your favorite mod?
I have to say Remote Tech 2.0. Being required to set up a geo-synchronous communications network is pretty hard but very rewarding once you transmit your first science from Duna (after waiting 2 minutes for it to travel through space, of course.)




I am new to the game and running through career mode with no mods to start. It makes things fun, honestly- if I had MechJeb, I wouldn't learn as much, for example. I want to try stuff like FAR and Infernal Robotics eventually, though.
MechJeb can be a little cheaty but he can also be used as an instrumental tool. Stock conics and instrumentation doesn't include statistics like orbital period or inclination; these are vital to some missions, such as, creating HKO Goe-sync orbital communications network :D