What Xbox1 game should I next get?

i've never been a fallout fan. there's no multiplayer in that game, so keep that in mind. and it's 3rd person.

i have black ops 3 and it's fun. it's a very quick pace shooter, like any other call of duty game. they have a jet pack feature similar to halo that you can "jump" in the air for a couple seconds to get around and wall run.

halo 5 is fun too. but it lacks in playlists like halo reach had. halo 5 gets free updates and DLCs though from the makers. the campaign in halo 5 is really short and leaves a huge cliffhanger for halo 6. if you've never played halo before, the story will be a little confusing to you, as halo 4, 5 and 6 are a new trilogy. halo 4 is on xbox 360, but you can get the master chief collection for xbox one that consists of halo 1, 2, 3, and 4, if you really want to understand the story.

GTA V is also a fun shooter game. it's an open world rpg game with a lot of action and crime. i'm sure you've seen videos on youtube. you switch between three playable character and play in a modernized fictional Los Angeles (los santos), which is pretty accurate. the campaign is long with a lot of side missions for each player, and there is an online mode as well.

get gta v that game never goes out of style

If you enjoy RPG mechanics and single player adventures, you should probably go with Fallout 4. If you feel adrenaline pumping competitive multiplayer is more your thing, may as well get BO3.
Some other games you may not have which you could consider:
- Halo: The Master Chief Collection
- Borderlands: The Handsome Collection
- Tom Clancy's Rainbow Six Siege
- Wolfenstein: The New Order
- Far Cry 4

Fallout 4 is probably the best shooter on the xbox one, but I guess it depends on what you enjoy in shooters