<- Lapras for many reasons :
1) It's part water type and I love the water type because I love water in general .
2) For me, it's the cutest pokemon ever, it looks so gentle and adorable !
3) I'm a French math teacher student so I like Maths. Lapras is named after the French mathematician Laplace.
4) It's so versatile, it can be offensive, defensive, dragon dance, curse, perish trapper, cleric, etc... It may not be the best at a particular role but its versatility makes it very fun to use competitively.