Splenda for me too but I still use sugar (synned) in tea as I cannot stand any of them with my lovely cuppa. Unless it is green tea and then I use the tesco value tiny tablets...
It has to be splenda for me hun. I can't stand saccharin or aspartame based sweeteners (although I can tolerate aspartame in yoghurts etc - strange!). I only use splenda in granulated form as I find the tablets are gross!
Splenda is a sucralose sweetener, and personally I think it tastes more like sugar than other sweeteners. If you have an M&S near you their diet yoghurts use sucralose as the sweetener - yummy yummy!