Just started NG+4, I'm trying to power through to NG+6 to get the max Starborn ship. I think I'm level 135. Otherwise, my favorite ship is The Narwhal.
THAT is a nice ship. The Narwhal just has slightly better stats. I haven't even gotten into ship building yet, I recently unlocked level 2 (I need to install 15 ship mods).
I think that's going to be the endgame for me, building outposts and ships. I've maxed out most of the physical, social, combat, and ship perks. Now, I need to focus on the crafting, scanning, and science perks.
I was using a lot of free mods, and their authors released paid versions, so I bought them to support the authors. For example, I was using Starshards (random crystals with beams of light appear on planets, collect 3 to get a perk point) and Standing Stones (like the ones in Skyrim, give permanent buffs). Recently, he released a more robust mod which included those and more for like $3. https://creations.bethesda.net/en/starfield/details/c04ac190-e3de-44bb-9d0a-cfcd943bd1c6/Tiny_Reasons_to_Explore