Any animal as a mount.

[The Night Shade]

A dinasour

 

[Palindromemordnilap_v1legacy]

Pull a Dresden and ride a T-Rex. If I'm not having it eat, stomp or tail-swat you, I'm probably shooting at you myself

 

[glyphseeker]

royal ludroth from monster hunter tri deadly in land und sea (ah another attempt at picture failed)

 

[TobiasMP]

Audhumla (a giant cow that, according to norse mythology, gave life to basically everything else)

 

[TobiasMP]

A dinasour

Forget Audhumla, i want my own T-rex

 

[Ibanez887]

Ill take my mount as a Kodiak bear, and Ill be on top in a set of piece mail armor and a war axe screaming at the top of my lungs while running into battle.Ill also keep an H&K G36K on my back, just in case things get a little hairy.
Because, seriously, who would want to shoot a dude on top of a giant bear with an war axe in his hand?

 

[Angus565]

An Ostrich.

Spoiler: Who the hell needs horses anyway?

 

[Addendum_Forthcoming]

A giant grey wolf.

Either that or a gargantuan Funnel Web.

http://www.calacademy.org/exhibits/venoms/images/00_final/sydney_funnel_web_spider.jpg

^This times 200

Bursting through the wall, and I'd be all like 'What's new?'

 

[Drummodino]

King Cobra... with wings

Like this?

Bahaha I have gotta try one of those!

 

[VelvetHorror]

If all of its characteristics are multiplied as they are increased in size, I'd go with the Australian Dragonfly, which can maintain a speed of 24 mph. If made 12 feet long, and it's speed multiplied with its increase with size, it could fly at a smooth 846 mph.

*Hops onto his dragonfly and breaks the sound barrier as he flies away* Try to keep up fellas!

 

[JezebelinHell]

Red and blue colored "western dragon", with strong color saturation.
About 13 feet in length.
Just to make someone jealous...

 

[Ithos]

A squirrel. It worked great for Chewbacca during WW2 :3

 

[Jzolr0708]

Tyranosaurus. With a Lazer Beam and Machine Gun

 

[elbrandino]

Either a giant cassowary, bear, or a tiger. That or something else sufficiently ridiculous.

 

[UltraDeth]

A Brumak of course

 

[holographicman]

an ostrich of course.

 

[MagnetoHydroDynamics]

One of these...

 

[ninetails593]

Serious answer: A fox. Less serious answer: A dragon(so I could throw wolves at maggots from the skies) . SUPER CEREAL ANSWER: MANBEARPIG

 

[Fetzenfisch]

Yup. I win.

Nope, sorry, but you don't.

Spoiler: I think this will do... Maybe get a flame-retardant suit first.

What? It's sort of animal-ish....

This guy does.

I'm sorry but nothing screams "badass" like riding a fucking Balrog.

not remotely as badass as the robot-unicorn , a balrog may rip you apart, but the robocorn stabs you in the brain, giving you a feeling of an eternity of

Spoiler: this

before it allows you to die


and the worst thing is...it makes you liking it.