My favorite starters are Typhlosion, since he was my very first Pokemon and I have very fond memories of destroying Johto with him, and Delphox, because I love her design (adorable and badass at the same time) and she is one of the best starter Pokemon I've used so far in my opinion. I also really like Blaziken, Sceptile, Charizard, Swampert, Meganium, Feraligatr, and Venusaur.