My yard is an example of vines gone wild, I have a Cup of Gold as well and it sends out long leggy branches but no blooms, gets a good dose of afternoon sun, but shade in the morning. I have a Hawaiian Sunset Vine that I am suspicious of-if I stand still too long, I swear tendrils start reaching out for me. I have a Rangoon Creeper, lives up to it's name and a New Guinea Trumpet vine, that has taken over where the others have left off. I am afraid if I look too carefully, I might find the neighbors pets or a storage shed or two.
Here is one of the better behaved citizens, St. Francis Lilac Vine.