Anything in the upper tenor or lower alto range for me that comes on the radio. As much as I enjoy singing, I've never been much of a music buff, with nearly all of my music intake coming from the car radio. (That is, I rarely buy anything, nor do I just turn something on for the sole reason of listening to it and doing nothing else.) Most of the music I enjoyed singing in my male voice works for training my female voice. Any that have very low pitches I just kick up an octave and go at it.
I also try to keep myself conscious of what songs a GG might sing in pitch, an octave higher, or not at all. It's funny how it works out in that songs I took down an octave before I try not to now, while some songs sit low but at an octave up strain my range.
