Eh, he can have a temper, I know it doesn’t necessarily come up day to day but when he’s pissed he doesn’t always contain his anger. He’s safer than a lot of people but no he doesn’t make my top three. My runner up for top three male non-humans was actually Garak.
Sure but he would handle rejection well and laugh it off. Riker, afaicr, respected signals and consent. He flirted with people who seemed open to it and was perfectly professional to those who weren’t. What makes flirting feel unsafe is the threat of men taking it badly if rejected.