Kuntrygirl I think we may like similar type wines. I like a very sweet wine too, and have found most times when buying wine to not buy the "good" wine. I like the flavors of the "cheap" wine better. My favorite is Riuniti Raspberry, and a couple of the flavors of the "box" wines (gasp!!!!) lol lol lol
Do you not even add yeast nutrients to your fruit wines?
To answer your question, Yes you should add yeast nutrient to fruit wines and here is why. That is THE correct way to do it.
Yeast Nutrients assist the wine yeasts in producing a complete and rapid fermentation. It is recommended for use in all fermentations. Yeast Nutrient also provides a singular source of nitrogen for the yeast to utilize during the fermentation process. Nitrogen is typically found to be naturally lacking in most wine musts. Insufficient levels of nitrogen usually result in a sluggish fermentation and can also lead to the production of unwanted fusel oils, which can be detected as off-flavors in a finished wine.
http://winemaking.jackkeller.net/feeding.asp
http://www.grapestompers.com/articles/yeast_nutrients.htm
Book mark this because he has the best online recipes that I have come across. I use it as a guide but of course I modify to my lilking.

http://winemaking.jackkeller.net/recipes.asp
With all of that said, the times that I made my first grape wine, strawberry wine, Japanese plum wine, peach wine and starting on my 2nd batch of grape wine, I DID NOT add yeast nutrients and it was ABSOLUTELY delicious. I did not have any problems with fermentation. The times that I did add yeast nutrient following the "professional" recipes my batch sucked BIG TIME. I'm not blaming it on the yeast nutrient but I'm just saying. It could have been "user" error. I'll just blame the bad batch on me.

I don't want to tell you NOT to use it because I do not want you to ruin your batch of wine. DO NOT take anything that I am saying about wine making and use it or do it to make your wine because I am years away from being a professional wine maker. I probably don't even qualify as making wine. I think I am making "hooch" or prison wine like they call it.

But yes, please use yeast nutrients. Check out the links above and let me know if that helps you.