I don’t really have a colour preference for phones/tablets. The only important thing to me is that my phone/tablet works properly and that I take care of it. I have cases on mine at all times that cover up most of the colour anyways, so it doesn’t really matter to me. I usually end up with silver tablets/phones, which is fine, though it’d be cool to own a more brightly coloured one one day. Rose gold, pink, or blue would be my top choices. I have a silver tablet and a white phone right now though, both of which I’m happy with! My phone especially; it’s my first white phone, and it honestly looks really nice! I like how the phone case I’m using looks with it.
When it comes to other electronics like gaming systems, there usually isn’t a specific colour that I try to get. I just get whichever colour option I like the most out of all of them. Pink, purple, black, white and shades of blue are what I typically gravitate towards though, but I’m never opposed to getting a colour outside of those options if I like it!
I’ve never decorated any of my electronics with stickers, though I have been tempted to decorate my switch. I have a lot of stickers that I’m not using, but I’m always so worried about putting a sticker down and then not liking where I put it/putting it down lopsided or not flat that I just don’t bother with stickers much lol