There have been many, many debates on many, many discussion boards as to the relative merits of SN and tablature! I don't want to re-open all that, but just wanted to add that the writing of arrangements for fingerpicked tunes has arisen from demand. Some people, frankly, can't handle SN, and others dislike tablature - so I do both - and stick in the basic chords as an aide-memoire. My software of choice - Harmony Assistant - allows me to do this in a reasonably sophisticated and clear way.

I never use the I, IV, V style of chord notation when creating the sheet music, but it's a very useful tool to use when discussing theory and general principles of chord construction.