BRB's are great!
My two favorite snakes (my third is blood pythons but I'm waiting a bit, i'd rather have more experience before jumping into one of those) would be black milk snakes and BRB's.
BMS's are super calm, easy to care for (adults don't even need heat, just high 60's at night, low-mid 70's during the day, which is normal "room temp" in most houses!
As for BRB's theyre a tiny bit harder to care for, need more humidity, a humid hide, etc. nothing hard if you dont do the research. They're also a bit nippier at first. My BMS smelled my nose (his tongue flicked me it tickled really bad and was adorable lol!) and then climbed on my and was like yay you're warm when i got him, while my BRB tried to bite my face, lol!
That said, individuals will vary, but if you want a BRB i recommend David from rainbowsrus, hes awesome!
Doris (My brb, dur)
and Genghis, my BMS:

(He'll be huge and solid black eventually lol, they're the biggest milk snake by a good margin)