I tune all of my 7 string basses BEADGBE
If you notice, there are only five strings to learn, as they repeat. Arpeggios and Scales line up better in a single position, and chord work on the higher strings becomes easy, as there is a huge reference of useable chord shapes available for free on the internet.
I wouldn't change to B E A D G C F# because i have learned this system, which makes it so i can pick up a guitar and show someone exactly what i want in a voicing or a run.
I think we need to be flexible on tunings, but i also play Uke and Lute.
"The Intonation is evidence of a Correct Motion."