Star Wars: Shattered Equinox
Shattered Equinox has many good qualities, such as strict,but fun administrators and builders Vorian is my fav administrator.20-30 players usually active at once, gigantic world, with at least 20 planets(more to come).Plenty of unique mobs,items,and armor to strengthen your RP. Numerous Ships, fully customizable, also you may buy custom ships, once avatar. Buyable homes, with the ability to put furniture in it.
You should definatly play this MUD, best one out there!