Calling it 'black' and 'white' is an easy way to categorize and explain things but once you scratch the surface you'll notice that magick is rather grey and the lines of 'black' and 'white' are blurred.
A love spell to a beginner would be seen as 'white' magick, but then you ask yourself is it a 'attract love to me' spell or a 'make him/her love me' spell. Eventually every spell can be argued as 'black' or 'white'.
I love gathering spells, buying spell books, making spell books, writing and exchanging spells, but people are often surprised to find out I rarely cast spells. This year I've done a job spell for my boyfriend and that's it. I don't need anything so I don't typically cast spells. [Exception to cleansing and protection but that's a regular thing for me] you should really think before you cast. Do I need this spell? Will it effect anyone? If so, good or bad? Things like that, sadly most people cast when there emotions and not their brain is running things. While emotion can add energy to the spell, it shouldn't be the deciding factor. That's why I normally meditate on the question or do a divination if I cannot separate emotion from logic.