Hi Heavenly Blue! I agree morning glories can be invasive, but they are so pretty it's worth it to me. I particularly like "Grandpa Ott" which is a beautiful dark purple blue. In my area, they are susceptible to spider mites and a tiny black and orange worm.
They volunteer very willingly, so once you plant morning glories, you won't have to plant them next year.
We have Grandpa Otts growing in the sidewalk cracks. Sometimes I leave one or two. Those I do pull out, they are only a two inch plant on top, with a 12" tap root.