Suicune was already my favourite and when Zoroark, Master Of Illusions was released and I saw that shiny Suicune... That just further cemented my love for the Pokemon.
I don't wanna say Suicuine...I want to appreciate the 'under dogs', but I just loathe Entei, and Raikou well...doesn't have much going for him yet (unless he gets his DW ability one day). But this is HGSS so Ill say Suicune.
Raikou!
I ended up getting all the shiny dog events for BW, but somehow my shiny Suicune vanished....
But shiny Raikou (and even regular Raikou) I think is the coolest looking of the 3. Entei is a close second.
I've always liked Raikou but now I've been torn between him and Suicune. Not saying that I don't like Entei at all, but there's just something really appealing in Raikou's design. ;080;
Suicune, short and simple. I love this Pokemon from start to finish. I think that i had the most fun just trying to track this Pokemon down and work out a place in Johto where I could track it down and try to catch it. The cry of this Pokemon is amazing as well.
Raikou. I've always loved it because when my cousin came over and showed me the difference between a shiny Raikou and a regular one, well you know the rest. It was like love at first sight.