It's taken me years to find a sports energy gel that I truely like. As a racing cyclist I seem to have 3-4 per race so need something that tastes right after 100 km+ of racing at workloads.
I have used Science In Sport Isotonic energy gel packs for the last couple of years now. They have a fairly mild taste (I particularly like the traditional orange flavour) which isn't too sugary
As they're isotonic too I don't need to take in extra fluid for absorbtion too.
Apparently Lance Armstrong had them provided to him while racing as they were his favourites despite his team being sponsored by a competing sports nutrition company.