Ok im a huge Water type fan so ima try to list different types.
Mine are (in no order):
Eevee : it gives you the alot of choices for later evolutions.
Squirtle : its always been my fav. starter pokemon since the beginning and
obvioulsy my first pokemon in Pokemon:Blue ( aaah good times!! )
Nidoking : not much to say , but I find him to be a pure badass ruling next
to his queen in his kingdom
Cubone : I just love his story of loneliness, he's a loner since birth
and struggles on his own to survive. Another reason would be the
mystery of his face , whats under that bone mask ??!!
Ditto : well you can have any pokemon with him and I love the fact that you
really need to be knowledgeable about the all types of pokemon and
how they function it take lots of studying and practice to make ditto
shine .