Well, actually, since I'm addicted to exploration of the places I go, I never use car services *or* cabs except in the largest of cities, where hotel parking is very expensive and exploring can be done on foot. I even rent cars on most business trips so that I can tool around and check out the city after dinner. I don't do Orlando without my own set of wheels.
On those occasions when I have used a car service, the car has never been a limo, and I can't recall ever having a driver wearing a tuxedo, either. (A windbreaker with the car service logo on it, yes, but not a tuxedo.) I never travel with more than 3 other people; what would I need a limo for? The car services I use provide sedans for small parties.
I primarily use so-called "minicabs" (that is, flat-rate non-metered cabs) in the London suburbs, where I use drivers that have been recommended to me by people I trust, and I call them in advance. However, I don't even use those from the airports into the City. In London, the airport express trains can beat road-based transport not by minutes, but by hours. Once in the city, I usually walk my luggage to my hotel unless it's raining, in which case I will flag a cab.
I travel frequently, and I know how to pack for efficiency. Walking with luggage does not faze me at all, so long as there is a decent sidewalk to walk on. I happen to like trains, and will usually take them unless there is a water alternative (at LGA I like the Water Shuttle from the Marine terminal.) The problem I anticipate with the proposed MCO train is that it really won't be possible to walk anywhere from the LBV station.