Hi i need to choose a birthday gift

Which one would you pick a cartier piece ( regular juc or 1 small juc+ 1 small love) or messika bracelet or the bulgari serpenti.
Let me know where would you start?
My issue a little bit is that i think i’m between 17 and 18 in cartier- 18 feels too big, 17 just stays in one place. I havent tried the messika yet, bulgari was comfortable. I currently have a stack on my left arm, i love stacking but also i don't wear anything to my right, from time to time i wear the Tiffany T in silver.