Hi Rubydoo, I use either an ali pan , wok or on occasion a pot. I've never noticed any difference in taste other than my kitchen will stay a bit cleaner in using a wok or pot.
I freeze tomato paste in 1Tbls amounts in ice cube trays, straight from the tin, as i find they defrost on their own quicker with less added water. Then dilute it when needed
I'm using frozen garlic(taj from Asda), & frozen ginger (cofresh Asda), which defrost pretty quickly, or can be df in the microwave. The neat blocks let me muck about with the GG ratios.
I've never frozen rice sorry, it either gets eaten immediately or the day after from the fridge
I've found through experience, that the base is critical, while being similar either on paper or through tasting on their own, the difference in the finished curry is clear. I've still not settled on a favourite yet, I don't think I ever will
Regards
ELW