Let's say (or at least pretend) I am learning guitar for the first time and only want to play my own music, the music I have in my head. What kind of tuning should I use to start with? Is there a general purpose, regular tuning? What are the differences between tuning in fourths like a violin or in fifths? Is there an easiest tuning for fingerpicking melodies and another easiest one for chords, if I can't have it both ways with only one tuning? Is this the reason some great guitarists like Jimmy Page have a two-neck guitar?
BTW I have tried standard tuning, I manage to play my songs with it, but it annoys me most the irregular tuning of the 2nd string. E.g. if I learn to play a melody in first neck, I can't use the same note patterns I have learned through muscle memory in second neck. It's difficult to move along the neck because of this tuning irregularity.
If you experts were to advice an absolute beginner, who only wants to invent his own music on the guitar, rather than playing other people stuff, what tuning would you advice and why, so he can make an informative choice? Why is standard tuning so much used? Just for historical reasons?