I took five years of Spanish, got tired of it, and took two years of Latin in undergrad.
But now I'm interested in Spanish again. I'm mildly conversant and can read Spanish newspapers, but would like to become fluent.
Mandarin is the most-spoken language, but when you look at secondary languages, English and Spanish are
huge. Both languages spread to multiple countries and knowing both will get you by in a large portion of the world. My Spanish is good enough to get around Spanish-speaking countries, but not good enough to have good conversations with people.
I'd like to improve so I can travel around Spain, Central and South America. Also, there's terrific literature in Spanish - I'd love to read those books in their native language.
If you're bored with Spanish, maybe think about taking conversational classes somewhere or maybe spending a few weeks or a summer in a Spanish-speaking country. The language will filter in and you'll get an appreciation of the culture.
Also, learn to swear in Spanish. It's a very colorful language.
Another benefit is that Spanish is similar enough to the other Romance languages that it'd be fairly easy to pick up French, Portugese, Italian, and others.
