@Minibiker depending on budget I'd say a sweeter whisky that I love is the Bunnahabhain 18. What a fantastic dram that is.
One that's fairly priced and still very good is Oban Little Bay. We went on a tour of the Oban distillery in November and tried it there. It possibly fits what you're after.
The Spey Tenne is also very nice but I haven't seen it about recently. It has a cherry lips kind of flavour to it.
Kavalan whiskies tend to be sweet - hints of tropical flavours like banana, pineapple and coconut. King Car Conductor is one I'm fond of.
Others that spring to mind:
Eagle Rare 10 - a nice bourbon that sits a couple of tiers above the typical offerings (JD and the like)
Balvenie 14 Caribbean Cask
Nikka From The Barrel
And finally (OK this isn't whisky but it's lovely) Diplomatico Reserva Exclusiva Rum. That's a nice sweet drink, great on ice.
If you get a whisky and find you don't quite love it, there are plenty of options:
1. Add ice - temperature can affect flavour and take the edge off. Also the melted water can mix things up a bit
2. Add a drop (or a few) of filtered water. It's not dilution, there's a reaction which brings out additional flavours
3. If you're really not getting on with it, add some lemonade, honey or something else you like. As you progress through the whisky add less and less of the mixer until you're drinking it neat.
Just some ideas