Next on my list to try is an apple , any suggestions ????
Like bananas - apples can be very variable in quality.
There is a huge number of different varieties of apple. You'll have to try them one at a time to find ones which you like. I reckon you will be able to find at least one. If you get some that are a bit below par, don't write the whole variety off. Ideally, if you get them from a market, ask if you can try a slice of one before buying. Most stall holders will let you sample stuff if you ask nicely and become a regular.
I quarter apples and then slice the core parts out, including the seeds. Then I inspect what is left for bruising and cut out any bruised parts. Cut just before eating because apples oxidise quite quickly. They will go brown if you leave them for long. If you only eat half an apple, you can cut the brown part off the other half when you come to eat that. It is usually only the surface which is affected.
Don't stock up for weeks ahead. You want to buy a fresh new bag each week. If you buy them in good condition, don't bruise them and keep them in a cool place, they will be fine for a week.
I gave up on Granny Smiths because you can get absolutely great, sweet ones one week, and the next lot can be horribly bitter. Golden Delicious seem to be pretty variable too.
Cox's can be very good. They should be firm and sweet, but I've had some which are a let-down. Braeburns are also usually good.
My current faves are
Jazz apples. A local market stall holder introduced me to them a couple of years ago and I've only had two disappointing bags in that time.