i'm asian, and haven't had uncoloured hair for many years now =)
i'm SO against the orangey bleached dry hair that so many asians do.. to me it's purely indicative of a poor (or cheap and amateur) dye job! Don't do it!!
Ash tones (cool) have worked really well for me and other asians I've seen, especially when I had blonde highlights. Now I'm a rich burgundy (dark red brown), which also looks great. Natural rich chocolately browns always look great on asians too.
Dark hair always makes your hair look soo much healthier, shinier, softer, but good blonde highlights can be a very sophisticated look. And bold colour inserts are always fun and can express your personality.. but one tends to get tired of them very quickly, so if you want that, maybe you can get clip-in extensions.
So it depends on your natural colouring; even Asians differ a lot in their colour tone - are you a warm colour tone (reddish, olive, darkish), and cool ("blue"-toned), or have a lot of yellow in your skin? You will know what colours in your wardrobe work best on your skin - go find out what hair colours look best on you too.
So - as you're pale, dark hair could make you washed out, unless you always wear good makeup (dark eyes, blush or lipcolour). But too light hair will also make you look too washed out..(unless you stay mid to dark, with a few blond highlights). Seeing as you're rosy, you can wear reddish tones too, so you could consider that.
Maybe mid to dark tones? Maybe you could mix it up and have a few shades in there, of the one colour theme...
I've come across very few Asian girls who actually look better with their natural black / darkest brown colour. Mostly it makes them look washed out and plain.
I've had to ignore a lot of white men, mostly, who feel strongly that asian girls should not colour their hair. A lot of them just want you to fit their mold/perception of what an asian girl and asian beauty should be (long black hair with blunt fringe etc). It's almost an oppressive stereotyped view.
(though I'm not saying that that's what people on this forum think, but... let's all let each other express themselves through their haircolour, among other things)