Pikachu is clearly my favorite, no contest. The anime played a big part in making it so appealing. It was my favorite Pokémon as a kid and remains cute in the more recent generations.

As for other electric types, that will be a little harder. In general I've not found many electric types I've liked and usually give them up in my final team. I guess the best one I got is Zekrom, and for a non-legendary, Electivire.

Raichuuuuu! :D

Although electric is my favourite type in general so I have lots of favourites - Lanturn, Magnezone, Galvantula, Plusle & Minun...

I should really raise an electric gym team some day.

My favorite Electric type is Galvantula.

my fave eltric type is the rare surfing pikachu

Electric types are a bit too rare for my taste, I hope Gen VI introduces a whole bunch of them.

Your mention of Plusle and Minun reminded me of my favorite "electric rodent Pokémon" after Pikachu, that is, Emolga. This little critter caught me completely off-guard. Part of the reason Elesa's team was much harder than the average gym was because of Emolga's annoying Volt Switch and Flying typing. Also, Iris' Emolga in the anime is devilishly evil in characterization, but adorably so.

Fire needs more members, to be honest. We're lucky if a new gen introduces 10 more, while Water is normally getting 40+ new members each generation...

Electric might not be as common as Water, but they get tons of new additions.

You're right about Fire, I forgot how rare they are. Remember when Generation IV's only new Fire-type evolutionary line was the starter Chimchar? That was plain embarrassing, especially with a Fire-type Elite Four member.

Yeah. It's just plain sad how little love Fire gets.
Fire E4 member with only 2 Fire types on his team? That's pretty inexcusable.

Oh, let's name Fire types now :).

My favorite is the Cyndaquil line :D

Favorite Fire type?
This one is kind of difficult. Charizard is pretty badass, but Blaziken is a flaming chicken, and that's awesome.