Regarding different sexualities... I'd like opinions please!

For the last, oh, 70 years, the existing recognized labels have worked quite well.

By having broad, inclusive labels, people are able to feel part of a larger collective of people sharing common experiences... And if they are uncertain, labeling as questioning or 'mostly bi' serves quite well, is understandable by everyone, and doesn't put them in a box they will later have to backtrack from, or limit who thy are.

I strongly believe that using labels (to the extent any label at all is required) that are widely understood, have a common basis is study, research, or broad acceptance, and have a consistent and grounded definition is by far the best choice, particularly for the individual trying to figure him or herself out.

The 1000000 labels du jour basically do none of those things and often cause more angst and confusion than they resolve, simply because there is disagreement on their meaning, and because they lack any wide acceptance. A label that has little acceptance, a contested definition, and nothing on which to base it really isn't of much value if it is to be an accurate descriptor of someone's secual identity, which sort of defeats the purpose... unless, of course, the label is more about asserting uniqueness and specialness than about accuracy. If that's teh underlying purpose, then any label the person finds acceptable will work just fine.