Hello...I do have quite a few favorites as well, it all depends on the situation. But I suppose the more pertinant question is which Pokemon aren't my favorites, which will be responded to very quickly with "Dunsparce and Magikarp."
So help me, if you EVER bring a Magikarp into my home I will shoot you in the foot with a BB gun.The only reason I ever caught it was just to be able to say I caught one. If I wanted Gyarados and couldn't seem to find it any other way, I found myself a fished-up Lvl 20 Magikarp and gave it a Rare Candy. Or cheated for it. I have an intesne distaste for it, and Dunsparce is hardly better. It was difficult to catch, didn't want to stay in the Pokeball when I finally did find it and get it down to low HP/Status Effect, and then turned out to be almost fully useless.
But a short list of the Pokemon I like a lot are: Sneasel (And Weavile), Eevee (And all the Eons), Tangela (Excited about Tangrowth), Haunter (Only cool looking Ghost from the originals, in my opinion), Misdreavus (And Mismagius), and almost every Pokemon said here as a common favorite is one I like a lot too. I've always liked Magamar and Electebuzz, and I had several Rhydon. I'm glad they've been given even more evolutions. While I do like Legendaries, since they are so strong, I must say the only one I can number among my Elite Favorites is Deoxys, for two reasons.
1.) I saw him and knew what his name would be (Or close to it) without actually knowing what his name was. I mean, come on. Deoxyribonucleic Acid. (I might have mispelled that.) I figured his name wuold be something like Deoxyd. I think it is a clever joke.
2.) I liked that trading him between games changed his appearance and stats, and loved that they put the special Meteorites feature into Pearl and Diamond so you could make him which one you wanted.
Of the three starters, I honestly most liked Charmander. But since it was difficult when I first played the game to win with a Charmander, I usually went with my second favorite, Bulbasaur. I traded a Charmanader from my Red game onto my Blue game so I could have them both. I just think he looks cool, really. I'm a typical person, I like ghosts and Magic and Dragons.
Sableye. I thought it was awesome, from the moment I first saw it. It was a tiny little purple monster with a crazy grin and the most beautiful eyes in the world. And when I got my Sapphire game, I discovered about it's Type set, and that it was so good. I don't care how many people think it's cheap, it's effective and useful. If you want to cry about how it's dumb to use something with no weakness, then that's your bad. I personally think it's genius, although I do agree with many people that making Spirittomb was a bit excessive. Maybe an evolution, but to make a bunch of different Weakness-less Pokemon would ruin part of the game.