I like making costumes. That's the short story. I've always been artistic and costume creation on a budget presents challenges that I have to use my brain to overcome. I'm unquestionably a nerd. I've got an advanced science degree and spend every Saturday night playing a pen and paper RPG with friends I first met at a SciFi convention. I'm an avid gamer and devour manga. Cosplaying allows me to show reverence for characters who enriched my life while stimulating my brain.
I'm working on a Steampunk Mrs. Foster (Killing Floor), Professor Plum (Clue) and Frank Castle crossplay (Punisher). As far as goals, I just want to have fun and get some kudos for my work.
Elle Driver (Kill Bill), Haruko (FLCL), Mad Moxxi (Borderlands), Lilith (Borderlands), Captain Scarlett (Borderlands 2), Samara (the Ring), the Major/Motoko Kusanagi - military and combat uniforms (Ghost in the Shell), Asula Soryu Langely - yellow dress and plug suit (Evangalion), Mrs. Foster (Killing Floor), Terran Republic Infiltrator (Planetside 2), Barbarella, Lust (FMA), Samus - zero suit (Metroid), Gadget (Rescue Rangers), Seras Victoria (Hellsing), Faye Valentine (Cowboy Bebop), Jill Valentine (Resident Evil), Lupo (Resident Evil, ORC) Hokage Tsunade (Naruto), Matsumoto (Bleach), Rojuro (Bleach), Jayne Cobb (Serenity), Princess Leia - iron bikini (Star Wars), Stormtrooper (Star Wars), Zombie Amy Winehouse, the Baroness (GI Joe), Pandy (Dead Leaves).
Cosplay is borrowing the celebrity of someone I admire or someone who enriched me for as long as I wear their likeness.
The characters themselves. I really go with what I already know as far as cosplay goes. For example, the shoulder pieces on my Asuka Soryu Langely plugsuit were made from a Pinnacle vodka bottle. I started with a soda bottle, but it just wasn't rigid enough.
Work with what you've got and have fun.
I have been really lucky not to have had any real negative experiences. Complaining about being recognized as the wrong character pales in comparison to what some cosplayers experience.
Kudos to all the cosplayers who started making their own costumes and ended up going pro. I'm totally jealous.