Hi Ann,
I am not sure what my favourite tow car would be. Things to be taken into consideration would be the type of caravan one tows and the type of sites one uses.
I have chosen a modestly sized caravan of around twenty feet overall length / 1150 Kg MTPLM, and I mostly use well surfaced sites, although I occasionally enjoy stays on quiet CLs.
In order to heave me around to and from these places I use a VW Golf SE TDI130 estate, which has always been more than equal to the task. I have owned the vehicle for almost four years and 43,000 miles during which time it has had no breakdowns whatsoever (the only failure being to a dust cover on the rear hatch mechanism.) It has averaged 54mpg solo, and achieves between 30 and 37mpg towing.
I have been very happy with this vehicle, and will not hesitate to 'go for' something of a similar 'ilk' when it is replaced. Of course others will have their own favourites since personal choice is still permitted here - and long may it continue to be!!
Enjoy your hols.
Trevor M