In Frontier I spent a lot of time as an explorer just for the thrill of going to places that perhaps no other player had ever been.

Planning my routes so I didn't hit any dead-ends by being unable to make a crucial jump. Carefully checking distances between systems in case I jumped into somewhere with no gas giants & had to jump back. Sometimes making large detours to check in to a rare populated system where I could get my ship serviced because you really don't need an engine breakdown when you're 50 light years from civilization.
Occasionally I might run into a pirate fleet. Run or fight ? Can't afford to take module damage out there & I might have to use my last, precious missile, but if I run ? Frying pan ? Fire ?
And when I reached the very edge of the galaxy, what then ? Turn around & go back ? Continue around the edge, praying the ship would hold up ? Hours spent searching the map for some far-flung station where I could take some (metaphorical) R&R. Then onward, & all because later I could look at the star chart & say "I've been there". Fantastic !