Personally I love ship interiors. Its great to be able to walk through/around your ship, to be able to check the ship for damage internally and externally, just adds a lot (imo).
I would however add, it's even better to have maintenance jobs to do around your ship, fuel, oxygen, resources, damage repairs etc. Games like Space Engineers have maintenance you can do whilst the ship flies through space on auto. It adds to gameplay and helps the player stay really attached to their ship, get a bond with it, I think anyway.
Ship interiors (& legs) is, for me, an integral part of a space game, these days.