I have only ever had probes on other planets
3 on Duna, little more than RCS sensor drones in career mode, able to do very little except record temperature, and 1 flyby of Eve, which i messed up and caused to fly by far too high.
I have planned 2 duna missions, one of which crashed into Ike at well over 3000 m/s after a big planning mistake and poor judgement on my part (ignoring transfer windows)
The other mission which i planned out in full NASA style, with pre-drawings, calculations and research before the building of the craft in orbit, however when i managed to complete it after a week IRL of planning, the transfer window was still 200 days away, and i didn't want to waste my career time. I lost this mission which KSP was updated to 1.1 and Tac-Life support hasn't been updated.
Lastly, i can barely build functioning space planes because i can't quite get the fuel use right, i always run out a few hundred m/s short of a full orbit, and then i can't land them without a parachute being involved.