Mine is Vanilla Moose, closely followed by Poorboy's PwC. The Euro version of Menzerna FP rocks, but it isn't available here and there seems to be massive confusion as to whether or not it will be for sale here.
Other really good glazes are Klasse AIO (although I guess it isn't technically a glaze but performs a similar function, IMO), 1Z Metallic Polish and the Wolfgang Pre-cleaner.