The only negative aspect to climbing roses is that they must be deadheaded on a fairly regular basis as soon as the blooms fade. This can be a real job if the roses have grown above a level you can reach. But this one chore should not deter you. Roses are usually quite disease resistant. For a splendid effect, combine a few colors and varieties.
Annual vines are fun and whimsical.
I usually order morning glories, nasturtiums and black-eyed Susan vines from gardening catalogues during the winter. Nasturtiums and morning glories are usually placed up on a table or wall so they will be a mid-summer delight of trailing flowers easily visible to anyone who visits. I literally plant, water occasionally and ignore. They never fail me, blooming continuously until November when I finally throw them out. I plant black-eyed Susan vines in large wooden tubs with a large stake down the middle and four placed around the sides tied to look like a teepee.