Since you left it so open-ended, open up my list and sort by rating. Anything above an 8 means I really enjoyed it and would recommend it. Everything on my list has romance because it is essentially all I watch.
I should mention that I hate open / ambiguous endings, love triangles and guys chasing girls throughout the entire series. I might double check, but I think the only thing on my list above an 8 with an open ending is Padam Padam.