I think that a major contributing factor to my low spam count
I run my mail server on Godaddy's secureserver which itself has a spam filter that catches 90% of Nigerian 411 spans and Viagra adverts and the remaining immunity I can only attribute to my use of an obfuscated mail address for forum posts in which I use @_spamtrap_bobpowell.net which a live person could easily fix and which robots seem too stupid for still.
Finally, the contact page on my site has a simple "capcha" system that I created to do live person verification. The result is that I probably get 3 spam e-mails per day.
I would kindly ask that you wags out there like my pal Ricky etc do not go subscribing me to every list available. :-)