If you're afraid to try sugar-free things because you've done it before and didn't like the taste, try things with sucralose (Splenda) or stevia extract instead of aspartame. Aspartame has a very bad aftertaste. Also, sugar free foods taste better than sugar free drinks, generally.
I haven't tried stevia extract yet, but boy do I love sucralose/Splenda, even in drinks! I especially like Red Diamond sugar free tea. Tastes a lot like calorie-laden sweet tea, but with no calories and only 5 mg sodium! I also really like Jello Mousse... the caramel flavor is to die for!