[how do I access favorites from the marketplace to review, buy, or delete]

In the Marketplace you click on your name, on the top of the page. This will take you to your account page. You can access your favorites there by clicking on "my favorites", the third option from the top.

[How to create a cool forum avatar \ badge]

Okay, I gave it a shot with the help of everybody's favourite, superior picture edting program. Yes, MS Paint.

 

EDIT: Looks nice

[How do I change my avatar?]

 

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CMOQ wrote:

I don't want new clothing. I want a different avatar. I'm a guy. This avatar is a girl. I don't want a female avatar. Do I have to register all over again just to change avatars?

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No, you don't need to register to change your avatar's gender. An avatar is strictly speaking genderless. What ever you dress it with or tack on will make you appear as a gender (or even as something genderless, if you want.) It's one of the many, many customization options you have in SL for your avatar.

Your current avatar has a female appearance. In your inventory you'll have items which can give your avatar a male appearance, such as a shape, hair and clothes. You can also find/buy such items in Second Life itself or learn how to make them yourself.

[Let's see those Avatars! Post your favorite avatar pix :)]

Okay, here goes.

 

Freshly taken and exported:

 

[Where are all my friends? Come on in and lets get comfy by the fire!]

I'm new here but I'll gladly join. I got marshmellows!