Banana plugs, Spades or a little of each?

Bananas for ease of use. I use both WBTs on Crystal Cable and BFAs on DIY cables and both work well. Cardas copper spades on the end of jumpers between sets of speaker posts.

I recently tried these BFA plugs. I believe they have more contact area than spades. I find with spades, even good ones, you need to check periodically for proper tension. They will almost always need a little tightening after a while.

Not to confuse the issue, but I prefer unterminated speaker cable ends. Yes, they can get tarnished and don't look as tidy, but in my experience, terminations tend to dull the sound. I admit that I've never used WBTs or anything terribly pricy to compare them with, just standard gold spades and bananas.

the amount of pressure is what determines a good connection, the size of the area does not determine a good connection

according to an article I read many moons ago...

Use what is convenient.

You (and everybody else for that matter) can't hear the difference among spades, bananas, and bare wire.