I am led, always and inevitably, by melody. I love minor or modal tunes. 6 months ago I started teaming up with a guy from our song circle and now we sing together, just did an opener at a local club tonight. When we went through some of the tunes that we like we realized that if it was minor and in 3/4 time we probably liked it. Now we're deliberately learning tunes that are different to add variety but its sometimes an uphill struggle. Given the choice of indifferent words set to a good melody or good words set to an indifferent melody I will choose the the good melody first time. I like Scottish tunes and what my singing teacher years ago called 'those weird English tunes." I like a song to be interesting enough to be sung a capella.