1-Pokémon
2-Fire emblem
3-Super Smash bros
4-Mother
5-Golden Sun

Mass Effect
Metal Gear
Ratchet & Clank
Uncharted
Hitman

1. Fire Emblem - Without a question my favorite franchise to date and that is likely to not change for a long time.
2. Monster Hunter - Would be my nr. 1 if i ranked the list by playtime
3. Super Smash Bros.
4. Mass Effect
5. Paper Mario

Top contenders once the sequel comes out:
- Xenoblade
- Dishonored

Uncharted
MGS
Souls series (I know it's more of an unofficial series, but still)
Borderland

1. Legend of Zelda

2: Metroid

3: Pokemon

4: Mario

5: Xenoblade chronicles

Kingdom Hearts
Paper Mario
Portal
Super Mario
Smash Bros

No particular order.

1) Pokemon
2) Metal Gear
3) Ace Attorney
4) Mario
5) Mega Man

1. Halo
2. Super Mario
3. Paper Mario
4. Mario Kart
5. Smash Bros.

Final Fantasy
Mario (including spinoffs like MK and Smash)
Fire Emblem (really love that game, i'm totally hooked)
Fifa (just pledged that i won't buy the 2016 game)
SMT (i can include Persona to this series but yet to play)

1._ Metroid

2._ Crash Bandicoot

3._ Legend of Zelda

4._ Super Smash Bros

5._ Pokemon