Haha don't worry about experience or all that. No blaming here if you give your honest impressions. Just go for it and describe what you like and what could be improved. The analysing becomes easier as you get more tubes with clearly different sound. I find it great fun to analyse tubes and sound altogether. Gives your senses some workout. Glad you like them rockets.
@Coil: Man I wish I had knew about this Mullard deal sooner. Seems like a great deal especially if that is indeed shipped.