Why to study Irish?, Why do you study Irish?
I was raised speaking Irish for academical purposes. For one, Irish has similarities to a few other languages: French loan words, different order of words, many different pronouns, conjugations etc. If you're a seasoned or beginning linguist, it's a nice challenge. There aren't that many words in the language either.
Many Americans and Canadians study Irish to get closer to their ancestors who came to North America during the great famine and later, as well as out of general interest. It's a flowy, poetic language which is spoken by a minority in Ireland, but still nevertheless a language and a pleasant one to learn at that.
Also, it's handy when you're abroad to talk to other Irish people without any chance of people understanding since it's not as well known as let's say French.