I’m a DJ with a huge AIFF collection. I prefer Aiff, because it has a good quality and ID Tags, what Wav doesn’t support.
I had one track ripped with itunes from a CD, which was pretty good in Traktor, but a little low in mastering. So I opened Wavelab 9 Elements to put a L2 Maximizer on it and rendered into the same file back as AIFF again. After doing this, NI Traktor started showing me “Warning ID3 Tags could not be read” all the time. This is really annoying as I bought Wavelab mainly for this purpose: To pimp up my Track collection.