Favourite Starters in each Generation

Personally, mine would be;

Kanto:
Charmander 90% of the time
Squirtle 10% of the time

Johto:
Totodial 80% of the time
Cyndaquil 20% of the time

Hoenn:
Treeko and Mudkip on a 50/50 basis (depends on how I'm feeling)

Sinnoh:
Chimchar 75% of the time
Turtwig 25% of the time

Unova:
Snivy 80% of the time
Oshawott 20% of the time

Kanto:
Bulbasaur- 80% of the time
Squirtle- 20% of the time
Jhoto:
Chikorita- 90% of the time
Cyndiquill- 10% of the time
Hoenn:
Treeko- 90% of the time
Torchic- 10% of the time
Sinnoh:
Turtwig- 60% of the time
Piplup- 40% of the time
Unova:
Snivy- 50% of the time
Tepig- 25% of the time
Oshawott- 25% of the time

Kanto: Squirtle. Had good times with it in FR/LG

Johto: Totodile. Same as above.

Hoenn: Mudkip. It was my first starter ever.

Sinnoh: Tie between Chimchar and Piplup. They aren't that bad because they learn good moves and Infernape and Empoleon have good stats.

Unova: Oshawott. It has the most diverse level-up movepool out of all 3 Unova starters.

Kanto:
Squirtle 34%
Charmander 33%
Bulbasaur 33%
I feel all the Kanto starters are great and all equal in terms of overall usefulness throughout the game. Squirtle holds the slight edge, because it was my first.
Johto:
Cyndaquil 25%
Chikorita 25%
Totodile 50%
Just my opinion. Totodile is balanced and crunch helps with Morty's gym.
Hoenn
Torchic 50%
Mudkip 25 %
Treecko 25%
It would be an even 50-50 if we were talking Ruby and Sapphire, but because of Emerald and wallace as champ, Treecko becomes very useful in emerald.
Sinnoh
Piplup 50%
Chimchar 40%
Turtwig 10%
The 10% is all based on design. Not a great generation of starters. I would prefer not to use any of them really.
Unova
Oshawott 80%
Snivy 20%
Tepig 0%
Another just ok generation of starters. Serperior is the best looking starter evolution ever, but a terrible pokemon. Oshawott line is awesome, but the Tepig line is a huge fail for GF, IMO.

I replay games like a madman so no way I'm going to even attempt percentages?

I'm just going to go by my favorites with each.

Kanto - Squirtle, occasionally Bulbasaur
Johto - Chikorita. No exceptions.
Hoenn - All of them because they all rock.
Sinnoh - Piplup. No exceptions.
Unova - All of them because they all kinda suck so meh.

As for myself:

Kanto:
Charmander, 60%
Squirtle, 40%

Johto:
Totodile, 80%
Cyndaquil, 20%

Hoenn:
Treecko, 60%
Torchic, 25%
Mudkip, 15%

Sinnoh:
Chimchar, 70%
Turtwig, 15%
Piplup, 15%

Unova:
Tepig, 45%
Oshawott, 45%
Snivy, 10%

Some of the games I've only played once, so that's why my percentage is at 100% (even though I might choose a different starter the second time around).

Kanto
Bulbasaur 33%, Charmander 67%, Squirtle 0%
Growing up, it felt wrong not to take Charmander and have it evolve into an awesome Charizard. One of the more recent times I played, though, I started with Bulbasaur, but I found I didn't enjoy my playthrough quite as much. And I've always liked Squirtle, so I'm not sure why I've never used it.

Johto
Chikorita 33%, Cyndaquil 33%, Totodile 33%
Of the 3 main runs I can remember playing in Johto-based games, I had no particular preference towards my starter Pokemon. All 3 of them stayed on my team for the majority of the game, but they all ended up taking a back seat to my other Pokemon.

Hoenn
Treecko 50%, Torchic 0%, Mudkip 50%
While these numbers looked like I favored Treecko and Mudkip equally, my Sceptile ended up being my best Pokemon in Sapphire, and I still have my original one from 9 years ago on my current HeartGold.

Sinnoh
Turtwig 0%, Chimchar 0%, Piplup 100%
One of the regions where the numbers are stacked in favor of one Pokemon due to only one playthrough. However, my Empoleon became a powerhouse on my team, and I really liked the Water/Steel typing, so I would probably choose Piplup again if I ever went back for another run.

Unova
Snivy 0%, Tepig 0%, Oshawott 100%
And the other region with a skewed number. My Oshawott -> Samurott didn't play as big of a role on my team as I was expecting, but it held it's own. When I get B/W2, I'm leaning towards choosing Tepig as my starter, but I'm not fully decided yet.

Kanto: Squirtle
Johto: Totodile
Hoenn: Mudkip
Sinnoh: Chimchar
Unova: Oshawott

As you can tell I favor the water starters, all except for Sinnoh because I was never very fond of piplup.

k this is about the pokemon not really the games so off it goes byeeeee

My faves from each generation:

Kanto - Squirtle (I loved its anime personality)
Johto - Cyndaquil (It's cute, and most useful starter in G/S/C/HG/SS)
Hoenn - Mudkip (Yes, I really do liek Mudkipz)
Sinnoh - Chimchar (Because I love monkeys)
Unova - Oshawott (You all know why I love him, he's super adorable!)

As you can tell, I usually favor Fire and Water starters. Some Grass starters are okay in terms of design but I don't work well with Grass.

Kanto: Bulbasaur
Johto: Totodile
Hoenn: Mudkip
Sinnoh: Turtwig
Unova: Snivy

I give grass starters their love, since I do also really like Chikorita and Treecko. But as you can see it's mainly Water and Grass starters for me. Everyone else can keep their fire types hahaha. Not saying I hate 'em, but I just like another starter more.