Tuning all in 4ths is quite cool I think:

e.g

EADGCF

Because you can get a major triad off each string from harmonics (5 fret = same note as open string but 2 octaves higher, 4th = extra 3rd, 5th = extra 3rd) this tuning lets you play all the major chords in several keys; ADG and C.

Also any shape you learn low down will be the same shape on higher strings. Because of this I sometimes wish I'd started with this tuning instead of standard but it's harder to play chords with.