I've had 4, 5 and 6 string basses and went as far as using them all at the same gigs. I never let it mess with my mind because the EADG string are always the same on each bass. I did find the 5 string came in handy at an audition. The band tuned a half step down and I didnt want to retune and throw the setup off. I transposed all the songs down a half step and having that low B was great. Really throws the guitar player off trying to watch me for the changes.
kabooom!