Was going through my collection and sorting them out - I'm sure I'll need another decade the way I'm going. Thought I'll catalog what mints I had this time. It is interesting to see how many mints Russia had at one stage as well as foreign coins that struck for Russia as well.
The two most common mints people would think would be St. Petersburg and Moscow. Perhaps Ekaterinburg if you know a little bit more about Russian coinage. How about Suzun? Sestroretsk Mint - which is technically more an armory. Sadagura which used captured Turkish cannons as coinage. Foreign mints were involved such as Poland, Finland, Georgia, France, Belgium and even Japan!
While a fair number are common, some can get very difficult. I consider myself to be very lucky as a fair number of these coins were obtained before Russian coins became a bit too popular and expensive.
Here's my link
http://gxseries.com/numis/rus_imper...sia_mint.htmAs of my personal favorite... it's difficult but if I had to pick one:

This coin was struck in 1788 in Tauric Mint, Feodosia - better known as Crimea. While I am not going to spark a debate of where Crimea belongs to - at one stage it did strike Russian coinage for just a couple of years in 1787 and 1788. Quite interesting piece of history.
Please feel free to post some of the unusual mints struck during the Russian Empire!