I voted a 7.
Because of these subscores:
Terrain: 9/10 - I think I'm pretty good with building (playable) terrain. My strength is making maximum use out of a minimum number of doodads and prefering tile variety over of doodad spam - but I'm not that good with artistic or cinematic-like terraining.
Scripting: 7/10 - I know my stuff, but I tend to avoid advanced coding strutures and hardcore-programming gibberish - I tend to be pragmatic in coding and do use some hard-coded stuff where a modular approach would just be overkill (what's the point in using a dynamic trigger system if only one of my libraries actually needs it?).
In a way, this caused me to re-do a lot of my scripts later on when I realized a dynamic approach would have been better.
Modelling: 6/10 - I know all the basics and have the artistic skill to do it. I can create WC3 models and animations just fine, I just lack the time to actually do it. However, I could never do more advanced modelling at the quality level of SC2 art assets.
Texturing: 5/10 - Probably my weak spot. Neither do I have the patience nor do I have the skill to do proper textures. I selected 5/10 mainly because I'm good at UV-mapping and using WC3 internal textures to the fullest.
Content/Writing: 6/10 - Well, my writing skills definitely need an improvement. Most of my storylines end up being rather cliché-ish and characters are one-dimensional.
Gameplay-wise, I have over a decade of intense gaming at my disposal to know what makes a game fun and challenging. Though sometimes lacking originality.
General mapping: 9/10 - Probably my strongest point. I got the dedication that is required to keep a project running and as I got at least some experience with almost all topics related to mapping (modelling, balancing, writing, sounds/music, scripting), I can surely give this a healthy 9. Also, I love to deal with constraints, which there are lots in Warcraft III. I can't tell how many limits I already pushed in Gaias that I initially thought could never overcome. Max map size being the most prominent one (Still around 7 mb with all those resources, and there's still custom music that I can get rid of).
result: 7.0.