I like your creativity
However, you'll need to consider your RP. A zombie like the one you describe won't be able to run much conversation, and jumping into every thread with "Braaaaaaains" will quickly get boring and troll-ish. If you're able to fit it into intelligent RP, great!
The one thing I'm iffy about is the age - there was no undeath 200 years ago. Period. If you died 200 years ago and were raised by the Scourge, fantastic - but be sure to explain it (:
Keep writing. You've got the makings of an interesting character