I also like bananas specifically the WBT Type are what i use due to being able to tighten them.
Spades are a pain to connect and to keep tight. Lets not even get into the fact there is no standard size so its a hit or miss if they will fit on your application. we all know how equipment manufactures like to use various sizes because they can. How many of you have stuck one of the legs of a spade into the hole of the binding post because it would not fit around the stud?
Bare wire has always given me issues in most 5 way type binding posts anyway, The bare wire is in a guillotine and if you over tighten they sheer off the wire or bend, kink the wire strands. This is not an ideal connection and also loosens quickly and causes issue to the bare wire, Also bare wire corrodes and you loose connectivity there over time. Obviously this happens to all metal connectors regardless of type but the individual wire strands have far more surface area then tined or with a connector.
yup agree bananas are the ones I prefer.