For bases and purees I wouldn't peel it, a lot of the taste is just under the skin.
I definitely going to have a go at doing my own g/g paste. I'm just finishing off some TRS brand stuff, I reckon the ginger paste has a really strong taste that I don't find especially pleasant.
1. I've never used asafoetida in anything. 2. Fenugreek I use very, very rarely, in traditional dished, although I used it a long time ago in CA's mix. 3. Black mustard seed I use in traditional recipes. 4. Bought some, never really used it, chucked it when it went stale. 5. Curry leaf, love it, but only in South Indian/ Sri lanki stuff 6. nope 7. Love it, but only in my own invented trad recipes. 8. Never seen it. and 9. Paprika, never use it.