I always thought he and Tails are just the cutest video game characters ever. Though, I've known Yoshi for much longer. I play as him in nearly every Mario sports title, Party, Kart, etc. The only exception is Super Smash Bros.
Yes, Yoshis are cool as always. Speaking of size, we know they are heavier than Mario and Luigi in the main series in order to be ridden on, but lighter than Mario and Luigi in spin-offs where they are just playable.