I like all kinds of beverages. My all time favourite would probably be green tea(hot or cold) but even in that there's a lot of variety. I don't think I could ever pick a favourite out of sencha, hojicha, gunpowder, etc. :-) Juice is good, I think my favourite juice is probably grapefruit juice. Pineapple juice is really good but it's too sweet so I'll cut it with cranberry juice.
Soda is okay but most sodas come in serving sizes that are too big for me. The 16 oz plastic bottles to me are insane, even 12 oz cans are too big. If the standard size for sodas was 8 oz or so I'd drink more. I used to drink Red Bull a lot and the standard size for that is 8 oz