The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

than LOVABLE rogue
Nathan Fillion.
The Big Bang Theory Season 5, Episode 12

that will either make me look
like a LOVABLE goof
The Big Bang Theory Season 7, Episode 19

I'm sure it's LOVABLE.
The Big Bang Theory Season 7, Episode 19

Koothrappali is the LOVABLE foreigner...
The Big Bang Theory Season 3, Episode 17