I have started collecting tomicas recently. My collection is very little, so far only
Nissan GT-R
Lamborghini Reventon
Mercedes-Benz SLS AMG
Lamborghini Aventador
Tomicas are nice as I have a keen interest in miniatures in general. They are quite cheap too. I also have collected other miniatures, including diecasts 1:64 by kyosho and gashapons. Gashapon minatures (e.g. food, camera) are cheap so I will strive for a full set. For diecast car miniatures, I go for cars which I like. Kyosho diecast are pretty expensive.
Currently eyeing at a 1:64 scale Lexus LFA from kyosho. Hopefully tomica has the Lexus LFA as well!