Reasoning? Well, Typhlosion was my main man, my first starter, the first badass pokemon I ever fully evolved. (For this same reason, Pidgeot also has a place somewhere on this list, esp since it has those cool eye markings)
I also loved its cry in its 16bit(?)glory
[video=youtube;mEmM6ALumpk]http://www.youtube.com/watch?v=mEmM6ALumpk[/video]
I always hear it say something like TehStroooooooonggggg when it does its cry. Maybe that's just me. Either way, the sound and animation is epic
Suicune because for one, it's blue, but second I liked how graceful it was, and how much you had to chase it around before you actually got it. Also I think it was my first legendary.
Blaziken because it was what I basically asked for in a pokemon, a fighting pokemon that looks sleek, but also looks like it can kick your ass in 2 seconds flat. The fact that it had a sort of fur vest made it even cooler. Also, BLAZE KICK TO THE FACE SON
Latios for basically the same reason as Suicune, it's blue, you had to chase it around, and Latios just so happens to be a dragon.
I remember everytime I saw latios I would get a mini heart attack because I finally found it againnnnnn aaaaaaaa
It carried me through battle towers/frontiers and all that, which is why it's number oneeee
Same with Shouri, I also saw Latios in the heroes movie, and I also love Latios' cry
Everytime I hear that cry after finding it randomly adds to the heart attack
Absol because of its place in pokemon mystery dungeon, you're on the run from your friends because they think you're the one who will bring the world to its end, and then absol shows up and helps you out. (I think that's what happens) I used it before it got a mega evo, and then when it got it I was like yussssssssssssssss. Was really mad when I had absol the whole game, then I got the mega stone after beating the game. I waited 80hrs(yes I took my time) for that damn stone, and I didn't even use the same absol anymore since it was time to make competitive teams. :<
Espeon because it was what my eevee randomly evolved into when I was playing crystal, and I thought its huge ears in that game the way it stood there to be really cool.
Glaceon because it reminds me of Espeon, and I like how it looks, and again, it's blue.