Addictive is the correct answer I've never heard addicting except by non-natives and young children a simple Google search returns the following[Image]

Ok as you've said you used Rosetta stone I gather you're not too horrified by paying for such things but I'll list what free things i could find first: Free: Tae Kim's Guide (Website) japaneseprofessor.com(website) Nihongonomori (youtube channel) Anki(a program that can be used to help you memorise anything) tofugu (a forum about resources) leng8 (a website that allows you to have your writing corrected by natives Helloworld (app that allows you to exchange with natives) Duolingo (warning this shuld be used as a supplement only) Paid: italki (you might know of it ;P ) Textfugu (website, awesome teach yourself type guide that emphasises both grammar and vocabulary e=where many sources fall short on the latter) wanikani (website, kanji memorisation tool) Genki 1 (amazing textbook series but it does fall a little short on the vocab front)