IMO, SSV is an unbalanced mess of a fighter. It's fun for people who don't know how to play, but for fighter vets it's just too sloppy.
When I had SSV (all be it for XBox), I can say that while I believe I only knew a few basics of what to do, I didn't find it so much fun as I found it motivation for committing horrible masochistic atrocities.
I don't admit to being a fair judge of the Shodown series because, even for having tried to have liked it, it's never captured my interest for very long because I personally didn't find it fun.
V was less so, because it seemed a grand expanse of unneeded characters.
Sure, you could, effectively, set up a five to six button array in the in-game menu.
But, I didn't find that all too helpful either.
It felt like it couldn't decide what game it wanted to be most like from the previous games.
Bust and Slash revisions were cleaved apart as separate characters to add a boggling array to the character select menu.
The music of this installment, from what I remember, didn't feel very ambient.
The coloring of the sprites and backgrounds looked artificially bright, too. It almost felt as if Ted Turner had set out to colorize
Schindler's List in pantone or technicolor to make the girl in the red coat black and white.
Well, maybe saying that I like SSV the least of a series I don't like to play may not carry a lot of weight. However, it is a series I respect through IV (Which I did feel was fun but reached stagnation on the amount of feudal Japanese media that was around when I was playing it.) as a series which knew how to pander to it's audience.
That said, the "Which is best" argument is one I'm weary of seeing. It's all going to amount to bleating and opinion with little qualification in the end--as it always seems to with matters of entertainment. Different things are bound to please different people. You can form a consensus of opinion on the matter. What you're not going to get from asking "which is best from
insert entertainment type here" is a definitive.
Yet... it keeps happening.
Now, pardon me whilst I go outside to stop the Moon and Sun from revolution and the tides from turning.