OOH, I'm generally an ice cream snob but Ihave a huge heart for the slow churned light.
If you don't like the taste, it generally tastes better in milkshake format. Also, you could try making your own homemade icecream. The ice cream makers aren't too expensive, and you can use better ingredients. Could you switch to another dessert, like pudding? Even with some light whipped cream on it it's not as bad for you as icecream.
Or, as a last ditch result, try "the four bite theory". Try eating four moderately sized bites with about 30 seconds in between. Supposedly, four bites is all your brain needs to register that it has eaten dessert. Don't know if that's actually true or not, but it usually works for me!