I have to say i was like 9 when the pokemon craze hit america and i was sitting on the bandwagon in the driver seat :) generation 1 was the best by far, the variety of pokemon was amazing so many greats.

1. Nidoking by far after that no particular order...

2. Tyranitar

3. Alakazam

4. Noivern (yes from generation 6)

5. Pinsir

6. Feraligator

7. Charizard

8. Blastoise

9. Venusaur

10. Aggron

just to name a few...

1, Squirtle
2. Starmie
3. Ninetales
4. Togekiss
5. Flareon
6. Clefable
7. Snorlax
8. Gengar
9. Charizard
10. Ivysaur

As you could probably tell, gen 1 was my favorite.

Rayquaza

Mudkip

Squirtle

Charmander

Gen 1 and 3 are my favorite. Excellent pokemon designs.

Gen2
1.Arcanine
2.Lugia
3.Tyranitar
4.Gyarados
5.Articuno

Gen 1, but i like all gens quite the same

Blastoise
Arcanine
Starmie
Kingdra
Toxicroack
Milotic

Gen 2!!!

favortie pokemon
1. Espeon
2. Typhlosion
3. Blaziken
4. Charizard
5. Pikachi
6. Mewtwo
7. Lucario
8.Dragonite
9. Metagross
10. Scizor

1- Absol
2- Umbreon
3- Zoroark
4- Charmeleon
5- Roserade

Gen 4

Generation 3 was and still is my favorite. 5th Generation (with the exception of the first B/W) would probably be second.

In no particular order, here are my favorite Pokemon:
1. Togetic/Togekiss
2. Milotic
3. Espeon
4. Roserade
5. Victini
6. Glaceon
7. Empoleon/Piplup
8. Musharna
9. Mudkip/Marshtomp/Swampert
10. Gardevoir
11. Flygon
12. Dusclops
13. Lucario

And several more.

Gen 2 (Because revisiting Kanto and the Red Gyarados)

Lugia my fav.

No specific order and I decided to leave out legendaries since they seem to flood these type of lists

Hydreigon
Absol
Scizor
Ampharos
Tyranitar
Original Startes
Metagross
Volcorona
Umbreon

Im also probably forgetting a lot