Some would say that they are emo's but i would say that people who wear bright colours are ravers
a humanitarian i believe
If by lovely you mean pretty, many people call butterflies and lady bugs pretty, but many beetles have bright colors on them; dragon flies can be red blue green or yellow, and wasps can be many many different colors
crazed fans
glow in the dark
Then I'd call you a pretty bright guy. You must have some good teachers and friends there if you like it so much which is very good.
The best word I can think of is anglophile.
A slang word for people who love wildlife would be "granola."
A person who loves their country is often referred to as a patriot.
A person who tortures and gets enjoyment out of it is called a sadist.
a drawing full of different colors how do you call it
Many people enjoy autumn for various reasons. We wouldn't call it 'love', but there is definitely an appreciation.
Secondary colors