Leopards don't really change much as they age, just a nice dark snake with a bright pattern. GHIs too.
I think in combos vanilla has been a sort of underrated gene, or at least I don't hear much about it very often. My pastel vanilla girl is getting close to 800g and still super bright yellow. I always think she's starting to brown out when she gets close to a shed cycle, but then as soon as she's shed BAM! Glowing bright beautiful snake.