Other than the fact i tend to not have favourites for anything, i'm not sure i could ever have a true favourite word in the English language. As the biggest language in the world (in terms of word count), you could probably never know every word.
Either way, here's a couple:
Idiosyncraitc
It has a very complete sound to it, i personally only ever use it in a positive way, if i ever describe anyone as idiosycratic, it's intended as a compliment.
Sublime
Again a complete sounding descriptive word. Some words lose meaning through there over use, words like Great or Beautiful can become some what disposable due to there apparent misuse, but Sublime remains a strong penetrative word.
Ric: I do like your 'idiosyncratic' use of the word 'lies'
