I find that as a driver I pay more attention to lights that communicate quickly and without distraction "I'm a cyclist!" and especially lights that move. Overkill christmas-tree bikes, fully-reflective jackets, and other such paraphernalia just make me go "what the hell is that?" and delays my decision making. For this reason I prefer using normal lights, a high-vis reflective vest, and reflective ankle wraps (bought those immediately after I saw someone biking with them in the dark and realized how visible they were to me and easily identified as a cyclist). I'm also a fan of reflective tape and will put some on my rims as soon as I get to buying it.

Edit: this vest: https://www.amazon.com/gp/product/B0030AA3YK