Great suggestions. Much if this is catered for in our Pro feature: Year in Review. For example: http://letterboxd.com/matthew/year/2014/
Bringing an all-time summary to the account would be a nice addition.Theresa commented
Came to say the same, and am particularly interested in all-time statistics, since I suspect I am one of many people using the service to catalog hundreds of movies watched over my lifetime. I would get the Pro account to see things like my Most Watched Actor of all time, etc.