In the course of our holiday to Brittany in the beginning of August, we managed to cross the Channel 6 times. Blech.
The first 3 trips were made on this one:
which was good as there was less faffing about at each end, but the views were terrible. Not to mention the fact that I expect the purists won't regard it as a ferry at all, grr.
My favourite ferry was this one, from Le Havre to Newhaven (look, it was £69.50, OK?

), mainly because it was half-empty and therefore not full of noisy kids, ergo Pembrokestephen got to sleep on the voyage. Always good.
My least favourite was this one, on the Cherbourg-Portsmouth leg:
Full of noisy kids, arrrgh.
And my second least favourite was this one, on the Portsmouth-Cherbourg leg (see, it's going the other way!): it was daytime, so I didn't need the kip, and quiet - for some strange reason all the kids on board were well behaved.
Those express ferries are excellent from the point of view of speed, but it's no fun not being able to get out on deck and feel a tiny bit nautical...