Being bilingual helped me understand English grammar in a way I wouldn't have otherwise. It also helped my writing skills immensely (IMO). Taking college junior/senior level French literature classes was extraordinarily difficult but rewarding. I did more work for my one French class than I did for five junior/senior level business classes (Finance/Accounting/MIS). It's why I eventually stopped, that and I realized I don't like evaluating literature in English, much less French (they didn't have business language classes at my Uni in the 1990s).