(before continuing i have only had 9 Bionicle sets and 3 of those was when i was younger.)
vehicle:
vultraz. I like the vehicle not the not possible, dark, abomination which they decide to give a name. (but I did accidently took off his arm then put it back on with out it breaking so yes.)
toa:
lewa uniter. this is the only toa set I ever had and now I can only find his mask
villain:
lava beast. i just love everything about him no complaints, not my favorite though
motron:
protector of ice.
rahi:
lord of skull spiders. hey here me out. he is technically a rahi and i like like him even after his flaws.
poly bag:
agil.
top 3:
number 1: vultraz.
number 2: lava beast.
number 3: loss
Edited for Triple Post - BioKnight