French—I'm good at translating and reading text; my pronunciation is at least intelligible (according to my French friends), but my conversation skills are a level 1.
German—Similar to French, but my conversation skills are better than reading & translating.
Korean—I've been to Korea several times, have several friends who try to teach Korean to me. I'm find it quite fun to do, yet I couldn't take it that seriously to get a 3 or a 4.
Chinese—Best at Mandarin. Cantonese is so-so. I have perfect pitch so just listening to how the tones are sounded by native speakers, and I'm fine. Main problem is reading the Hànzì (漢字). More about it in the next section. ↓
Russian—I was always fascinated by this sophisticated language spoken by at least 150,000,000 native speakers worldwide. I've used Duolingo to study, but eventually gave up due to its sheer complexity.
Spanish—It's always a very fun language to learn. A lot of people learn this language, regardless of accent or dialect.