I've had 4 grand cherokees and I've never had any more problems with them as I have with any of the other vehicles i've owned. Considering what I've put them through, I think they are pretty reliable vehicles.
I'm planning on picking up a Tacoma here as soon as the bank's find me to be less of a risk, but it's not a decision based upon brand lust. I just need a vehicle with a bed right now in my life, and for the majority of wheeling I do these days, a Tacoma is the right size and will get me to most of the places I want to go. I also don't drive as much as I used to, so I have no need for a commuter and a wheeler, so the gas mileage of a DD truck isn't as much of an issue. When I have the money to scratch my itch to go and beat up a rig on the hard trails in Moab (or elsewhere), I doubt the vehicle I buy/build will be of toyota decent...but that's just because I want a v8 and 1 tons.
I've always had the same opinion about people who are so vocal about their brand of choice. It sounds like they are in their rig because it's NOT a jeep, not because of what it actually is. If people need to constantly fluff their own brand to others, it just sounds like they are trying to convince themselves.