Less problematic, but still potentially confusing. Why break the standard and add another variable people need to consider in order to find the form and function they’ve already learned? Links are there as a functional element, not an aesthetic design.

I get people wanting to add their own touch or sense of style, but doing so at the cost of intuitive functionality, especially a kind that is long established and standardized, can be a slippery slope.

All that said: At the end of the day, it’s up to the creator, of course. If someone really wants to indicate their links with upside down text and no underline, or a glowing CSS effect, or whatever, I’m not going to demand that they stop. Especially if it’s a personal website. Your satisfaction with your work and self expression is more important than a guy yelling at a cloud about front end web design standards and whatever. I’ll just reserve my right to gripe over some minor personal annoyances, and everyone will be just fine in the end!