I too have a mildly addictive personality, so I've purposely ignored all those requests. Couple that with a type-A personality and I'd be online all night trying to 'get' everything or be the 'best' at whatever it is... I don't do video games either.

Besides, every time I get a Farmville request, it reminds me that I should go outside and spend some time in my real garden or with my real goats! I don't need online/virtual guilt too!