I think you should be able to choose around 5 planets to be your favorites, which would allow travel to them at no fuel cost. You have to use the fuel to get there first in order to favorite it. It sucks when you want to set up bases on some planets without ever being sure you'll make it back again..
I was thinking maybe along the lines of a Nav Marker system that tracks planets you have already visited, with maybe a commenting system implemented so you are not returning to planets you have no use for or have mined out.
I like this idea, maybe have 5-10 different color markers/flags that you can put on systems/planets as well as your idea to comment or note what you wanted to remember about them
Or why make only so few favorites, why not add Captens logbook where you can save the planets you been on and make a little note about them. Something like: Planet Bla bla 2 - Note: My old Homeplanet. I want to have signs to put up on the walls so you can write on and maybe some search system to search for the material that you have in your chest and highlight it. When you have 20 different 16 slots chests it takes a while to look through them all to find what you are searching for.
