If you have the time, punch a hole in the bottom of vertical mount filters. It'll save some of the mess and let it drain. I just wear my HF blue gloves, and wrap a rag around the filter to remove once it drains a bit. Toss the glove and the rag when you're done.
Ecotecs are about the easiest location, at least the 2.2/2.4 gen. The new ones in the cruze aren't terrible, just less room, especially on the 1.4 turbo. 2.5 ecotec is now back to a spin-on metal filter.
For ****** design, the finalists are:
GM 3.6, filter basically touches front manifold converter.
First gen of honda k20, wiring in the way, dumps directly onto axle boot, awkward.
Toyota 3.4 (and some abomination of a GM/suzuki V6 2.5 maybe?), buried on drivers side, obscured by diff and unibody.
Toyota v6/v8, COULD have been mounted horizontally, like the 1.8, but was not. Messy and hot.
Nissan VG/VQ RWD orientation. Tiny access hole, skid plate bolts snap off, impossible to clean without removing skid plate.
Honda earth dreams 2.4 and new R18. Stupid metal skid plate, held on with Phillips head bolts. The seize all the time, and lube-techs bend the metal shield all up.
Those VWs where you need triple square, and two different torx to drop the skid plate.
Goddamn LS engines with no room between the pan and the filter, so you have to use a band wrench, but the front driveshaft is in the way.
Those are the most current annoyances anyways.
Being that I work on cars, I would like easy to access filters. Being that the average car going 200k, at 5k intervals, is getting 40 LOFs, that the owners typically don't do..... they don't give a damn where they go. Luckily that's why lube techs exist.
Don't get me started on some of the places they bury crank sensors, or hide connectors so you can't reach them to backprobe.