It means I really liked TFC when I was in primary school. You can guess my favourite class.
It also means, I'm dedicated, I specifically chose to keep using it, even though it sounds very unprofessional. A name is just a word, It's only value is that people know you by it. Enough people know me by this name(in forums and stuff, it'd be a mouthful to say IRL) that it felt like it was worth the effort to keep using it.
It's been with me for around a decade now, I felt like I grew out of it a long time ago, but I plan to keep on using it anyway.