I think the important thing is that the distillation container be non-reacting. You can buy glass distillation equipment which is less durable.

The main NOTES of any perfume are middle and base notes. These last the longest and create the main scent. The top notes are strong but not long lasting, yet they provide an introduction to the main aroma that sets the mood of the scent. There are accords of scents that go well together, and changing a single note can create a very different scent. HERE is another list of fragrance notes.

My explanation is very basic, but the perception of aromas is personal. Not everyone likes the same perfume. It does come down to what you like. Using less of a strong middle note creates a lighter scent, but this can change the overall aroma.