I started on bass because it only had 4 strings, so I thought it was easier. (Well, I was only 15)
Plodding away on root notes with no concept of music theory.
I then picked up the guitar a few years later, once I had got the gist of the way the bass worked.
Understanding how major and minor chords worked together was a revelation to me!
I can now play both, in bands and at home with relative ease.
Its great to have another string to yer bow.