He has certainly changed with age - but so haven't we all - the cocksucker ;-)
See:
http://www.imdb.com/name/nm0574534/
SWEARengen - what an appropriate name for the fucker who swears so much.
Some of his quotes are on hbo.com........like:
“God bless you, Mr. Swearengen."
"Well, not likely. But my prospects have just improved.”
“I wouldn't trust a man who wouldn't try to steal a little.”
http://www.hbo.com/deadwood/episode/bestlines.shtml
Great show and last week was a killer.