I think a modern play would be better.Chinese TV dramas are divided into modern dramas and ancient dramas, and then they have many different themes, such as detective, fantasy and magic.Many idioms and times-specific expressions are sometimes used in ancient dramas.So if you want to learn Chinese, you'd better watch modern dramas.

只要你喜欢且主观性够强，看什么时代的剧都可以学汉语，没有不适合的。我推荐你看1996年版的神雕侠侣。你看过后就知道我为什么推荐这部剧。

1）当代生活类的影视剧适合学习者观看，贴近生活，词汇不深奥。 2）古代剧，奇幻剧，题材剧（如医学，侦探，法律）等含有大量生僻词汇的台词的剧，外国人不易看懂。 3）同样，我会选择反映当代社会现状的剧，有助于了解中国的生活。