I try to limit my personal accounts to people I know or people who make some effort to connect with me on a site, so by all means, if I don't know you, and you friend me, please introduce yourself and lets chat a bit. Otherwise, you're probably likely to find yourself either locked down in my privacy settings, or clandestinely unfriended a few days later. As we say on the show, this is a personal-yet-shared experience, so we expect a bit of an exchange to validate us.
On the other hand, if you're looking to passively stalk me and want to up your friend count, I'm a lot more likely to follow back but not harass you too much from the Indy In-Tune accounts. Basically these I'm just whoring out for marketing and promotion purposes.