Pity you never played Diablo II, that kicked ass over the third instalment as far as i'm concerned.
No Man Sky looks great, and for the first 30 min-1hr might keep you interested but like you say @rampant, its just rinse and repeat..new planet, do some mining, maybe tame the animals or kill them, power up, off to the next planet, rinse and repeat.
Looks amazing, but keeping me interested long term....no chance