Firstly, you need to remember that for a vine to 'cascade from the top of a wall' it either has to start at the top of the wall (e.g. in a planter fixed to the top) or it first has to climb to the top and then stop trying to climb and just let itself fall down. Even if you can persuade it to do that it will fall back down over itself, shading itself and getting into a right old tangle. You really just need a vine that will just cover the wall from bottom to top.

Any vine will attract insects because it will provide shelter from heat, rain and predators.

A few vines stick to walls by themselves but most need supports and will then cling to them or will need to be tied to supports.

Gold Child Ivy and Hahn's Ivy will cling by themselves but will not cascade when they get to the top. They will wave about and grow bushy. Planting any Hedera helix in Florida seems like a wasted opportunity to me.

Clerodendrum thomsoniae, aka Bleeding Heart Vine, climbs by twining so it will need wires or trellis. It needs plenty of water at the roots.

Can can Calibrachoa isn't even a vine at all but an annual plant similar to a small flowered petunia.

I do not know your climate personally but I would strongly recommend that you do not use Home Depot for plant advice since so far they have given you very poor suggestions.

How about going over to the Florida Forum and asking there, or simple walking round the neighbourhood until you see something you like and then asking the owners what it is? Or visit some local parks and gardens for ideas.