TIP OF THE MONTH: Constructing a root/5th bass line is not nearly as simple as it may seem! Certain cultures utilize the 5th to Root as standard.
Actually, 5 to 1 is much more interesting. For example, the 1 chord in the key of E: [b e b e]. That would certainly be preferable if the next chord was B7 (the 5th), otherwise the 'b' would be repeated if the approach was reversed: [e b e b].
If the changes are: E [2 bars] to B7 [2 bars]:
Good: [E B][E B][B F#][B F#]
Better: [B E][B E][F# B][F# B]
Best: [B E][B E][B F#][B F#]