I tried ADAD when I first started playing, thinkinbg it might be easier than standard tuning. But it limits you to one key (or two), and most of the people I play with will use other keys. A, C, D, E, F and G are easy enough in GDAE; and Julie B insists on singing in C# (give up: use a capo!). Actually, I play in Db, and she's never noticed.

Steve