The wine is for my project and I would like it to be tasty since I haven't really tasted any kind of alcohol.
I hope that the fruits that can be the tastiest can also be home made and doesn't have any rare ingredients in its recipe or complicated processes.
So, in your opinion, what would best suit this conditions and can still be tasty for you?

The tastiest wine I have tried is Blueberry wine. I love it.

strawberries

Cranberries. Cranberries. Cranberries.

Talk about an incredible wine!

How about using prickly pears?

Watermelon

grapes, apples, canteloupe, add cheese!

Grapes do it for me.

You can make wine from just about any fruit, and some other stuff as well (I make a hibiscus wine that is pretty good).
But there is a reason why most wine is made from grapes. Grapes contain so many different flavour compounds, it results in complex layers of taste (when made really well at least).

I have never made wine, but I have distilled my own moonshine or mampoer, the best I made was from lemons and secondly wheat. If you want some detail on this email me at royandpearl@mweb.co.za I can send you pics on how to make a very simple, efective still and a few recipies.