Well, I don't bag on tutoring kids or volunteering in a hospital, but I think I've got some interesting EC's (at least, they keep me interested!). Just keep in mind, I was told in no uncertain terms by an admissions director that EVERYONE should have patient contact before applying to med school, whether paid or not. So, no matter how generic SDN might pronounce it to be (a lot of people have volunteered in various ERs), it's still pretty essential to a lot of schools.
I volunteered in a hospice for a while, but now that I've got some other venues, I'm much happier than working there sitting on my butt doing next to nothing. I work with the youth in my church/district doing assorted leadership activities at summer camps, camping/hiking/winter camping events, doing security at a youth convention, etc. I think it's fun, and I would do it even if it never made it to my application.
I also work as an EMT, and that's a riot as well (and slow at other times). I was on a huge adrenaline rush about two hours ago, since we had an incredibly violent patient to hold down (it's amazing what large quantities of drugs and alcohol will do) and then some other interesting calls.
I do research as well, for a few reasons. I was told that it was a worthwhile venue to explore so that I can see what an MSTP might do, I also have gotten credit for it, and I've met some really cool people. It's pretty ground-breaking stuff, so if I get a paper published, it would be pretty substantial (and not like getting your name slapped on a paper along with 10 other research assistants).