I was given No Man's Sky as a gift (thanks Mike!) after being very curious about it for a long time. One question I had about it was how "combat heavy" it was and most of what I saw about the game seemed to suggest - a lot of it. That turns out not to be the whole story. One reason I was given this game is it has a "creative mode" which lets you keep out of multi -player, combat and the ins and outs of trading and building things and lets you just explore and enjoys the created worlds. Totally my kind of thing.
I have learned how to play much better over the last 100 hours of play and really like it! I made a base near a lake and then put an underwater base in that lake that I can travel back and forth to. I did go on a couple "missions" that didn't involve contact with other players and I found them... interesting. I came across an abandoned ship underwater and went on a search for it's crew and I started to look for a lost alien named "Artemus" and another named "Apollo" related to to finding the first alien but stopped actively pursuing it when I was told I needed to make space in my base and look for technicians etc to continue the search. Maybe someday. I completed... ? The Atlas station mission only to find it can't be completed definitively.
Since starting a few months ago the game has had 2 huge updates, one for a mission I wasn't interest in and another mission involving collecting fossils. I wasn't interested in the mission group thing but I could still collect fossils, make and display specimens on my base and found that super fun. Hello Games seems pretty motivated to keep the game growing and changing.
None of this takes away from the game as I play it. maybe if I were interacting with others it would be annoying or hinder game play but it's easy for me to ignore since none of those things will affect my outcomes. If you are looking for multi-player action and combat or running a small village on strange planet, those options are open to you but I can't speak to how well that works or how involved it is. I am happy playing as I do!