I've also found Dollar to be pretty good. They've lost a few marketing people in the last year, but i always count on them for promotions that will give me more than a mile for every dollar i spend. The "Fastlane" is OK, but it's still not where the Emerald Club and others are in that you can't just get in any car and drive away. Yes, paperwork is easier but it's not painless yet.
As for car rentals getting minor number of posts, I think it's because other than the big change last year to miles per dollars spent or per day, none of them have really done anything that warrants FlyerTalkers attention. Having said that, it would be nice if one of them, just one would understand they are lumped together and it's going to take a major iniative to get our attention, but it can be done. Who's brave enough in car rental companies? Seems the sizzle of the Buget golf clubs abd ski stuff is wearing off, maybe they have an idea?