Banana plugs, Spades or a little of each?

All other things being equal (the quality of the spades and bananas commpared), spades provide more contact area and are supposedly a better audio connector.

Yes, you can hear the difference in a poor quality spade and a higher quality one assuming your system is on par with the expense involved in the connectors, imo.

I have a hard time getting my spades to stay on the speakers. Whenever the maids come over I need to chech that they have not come off while cleaning.

I only use bananas because spades are always sliding off. Spades are a pain in the butt.

bananas..no wear and tear