Some points about unflavoured proteins.
Less than 5% of our customers buy it, and most that do, often go back to flavoured protein. If you like "sweet" it is unlikely you will enjoy unflavoured proteins.
It should be said though, if you find unflavoured proteins far too strong and don't care for any kind of artificial taste, it may be good change.
WPC has quite a distinct taste, it is reasonably sour with somewhat of a bitter after taste. I consider it borderline unpleasent, but not too bad.
WPI is very different. A good WPI should taste very neutral with only a hint of a sour taste. The fact WPI mixes more finely is a benefit too as at time the texture impacts on the taste.
There is a large reason why flavoured proteins are so popular especially for those who have it many times a day, if you can handle it, it is the purest and most value for money alternative.