World of Borderlands
The World of Borderlands is full of different variety of enemies, biomes, loot, hidden secrets and many more things waiting for you to explore. Borderlands series is one of the few series which offer a diverse game world filled with quests and activities which have a great impact on the story and character development. Borderlands 3 has multiple worlds and just like its predecessors, it's filled with everything you would have asked for.
Settings
In short, Borderlands offer different powerful people who try to get their hands on powerful weapons or entities which are inside the vaults spread all around the universe. The post-apocalyptic type of setting with danger lurking around is one of the best things.
Loots
Borderlands 3 is going to have millions of new weapons and loot. Borderlands series is known as the best looter-shooter game and Borderlands 3 is going to keep that title. The game will offer a new brand "Children of the vaults" whose weapons are created by vault techs. The new game has updated all the existing weapon manufacturers weapons and loots into a better one.
Voice Acting
Voice acting in Borderlands series is also top-notch. Voice actor(s/ess) like Dameon Clarke (Handsome Jack) and Ashly Burch(Tiny Tina) gave a phenomenal performance. These are just a few examples of the top casts of Borderlands series. Troy Baker who voiced Rhys from Borderlands the pre-sequel is also a prime example of good voice acting. Borderlands 3 is going to have the same level of new/old actors and actresses who are going to bring the 3D characters to life.