>I used Perforce for a couple of projects a few years ago, and I really liked it.

Yes it integrates fine with VFP PM, has it quirks but it is more the SCC part that might be the reason, rather than P4 itself.

>I had to use Subversion for a project (this was in 2008) and I hated, absolutely hated the interface and the entire process.
>
>Normally when I'm forced to use a product that has warts, I'll just grin and bear it - but at the time (again, 3 years ago) Subversion was so bad that it felt like punishment. (I'm told by people that it's been improved over the years).

Can't comment there as I have just touched on it's use, but I like the Explorer interaction it has.