I love Feta!
Athenos makes a reduced fat (RF) crumbled feta that's really delish. I can't tell the difference from the real thing, so I use that when I need plain feta. However, I really love adding flavored feta (along with a sprinkle of olive oil and balsamic vinegar) to steamed green beans, and I haven't been able to find an RF flavored feta (oddly enough, we have fat free flavored ones at our store), so I use the full fat.
It's good stuff. I think Dr. A agrees with Cyndi's take, overall, though--he points out that it's worth it to have a little bit of strongly-flavored full fat cheese, like blue, rather than to eat a lot of something lower in fat.