Sonic!!

I have read about Sonic over the last year and a half or so on various blogs, names and address of which I cannot remember. On those various blogs, I read about these tasty-sounding drinks and afternoon specials that sound so fun. Now, I find that there's one relatively close to us! So, now I ask for your advice... please tell me what you love best at Sonic so I have some idea what to order first! :-)