Complex sentence: Changing little in the way of substance yet striving to improve general quality, I am a stickler for English grammar and spelling--and though my writing skills aren't quite as sharp as they once were, I still gawts some purdy good grammaticals.
Split into simpler sentences: Changing little in the way of substance yet striving to improve general quality, I am a stickler for English grammar and spelling. My writing skills are not quite as sharp as they used to be, but I still gawts some purdy good grammaticals.