Personally I've become a big fan of tea. Hot and iced. In my opinion most teas don't require any sugar or require very little to offset a bit of bitterness. 9 times out of 10 I use no sugar at all. And that 1 time I do it's maybe half a teaspoon because the tea in question has a bit of bitterness or because I let it sit for too long.

Tea also has the added benefit that if you make it per glass it forces you to get away from the computer for a few minutes. Plus the aromas and flavors are, in my opinion, more numerous and pleasant than all the sugary drinks out there combined. Tends to be noticeably cheaper too :)

Seconded. If you live in a metropolitan area, you will likely have a Teavana or other chain/mom & pop tea store where you can go in and smell or try all of their varieties.

You'll easily find half a dozen different teas you like ranging from the classic black teas to exotic varieties that taste like supermarket sugar drinks (like strawberry lemonade - one of my favorites at teavana). The latter usually require less a 5g bump of sugar to bring them to the level of retail drinks.

Learn to like it. It's water for pete's sake. Vital for life.

I take GT without G. (Gin-tonic but no gin). Often the bartender laughs at this a bit and gives it for free.

Tea.

Have you been to many pubs? :-)