(And please don't say pink!) lol.
Anyone here can only offer you basic ideas based on what they think is nice. As Marisha said, figure out what interests you and use that as a focal point of your theme. You can also base your theme on a favourite colour, using other unconventional colours or patterns to liven it up. Your theme could be from a movie, a book, even a country you would love to visit ... whatever theme you choose, you want to make sure it makes you feel comfortable and inspired.
well what do you like? Do you like polka dots, strips, animal print, ect? if you do you could do a combination of two or more themes; for example zebra print with polka dots lol :P Just use your imagination :)
Reading (esp Harry Potter), speaking foreign languages, writing, stuff like that...
You should provide us with more information on things you like.
Polka dots. Stars. Hearts. Neon colors. Animal print.
Polka dots a favorite character u like, vintage, retro
What holds your interest?