worries about dyeing hair pastel shades

I have a bit of weird relationship with hair dye. I religiously pin images of girls with cute unnatural hair colours in a variety of shades, a lot of the girls I follow on instagram, twitter, youtube, and through blogs, have a fab rainbow collectively. I know it's all a bit ~tumblr queen~ #altgirl, a total cliche in the way of the internet, but I think it's a milestone you get to at some point. 

Basically, and I've said this a fair few times over the last year, I want to do something fun with my hair. Catch is: I'm terrified. 

I think the fear is born through slightly bad experiences on my own part, and horror stories on others, mixed with a very hefty dose of parental disapproval. I've dabbled with dye in the past; darker with cherry tones at 16; interesting dip dye at the beginning of freshers year of uni, and then a shade lighter than my natural colour to even things up before Korea. Since then I've not touched the stuff. My first experience was met with total outrage by my parents (mostly at the state of the bathroom), but I felt like I'd disappointed them somehow by wanting to change things up. 

The second attempt (dip-dye, pink) was done away from home at uni, so less of a problem if I stained the bathroom pink, but I always made sure that the pink was either fully faded or less present before my parents visited or I went home for holidays. I learned that my hair takes colour exceptionally well during the pink stage, that pink was vibrant.  The third colour was an all over and hardly noticeable really. 

My 'slightly bad' experiences are just my parents reactions to me doing anything, really. Which makes me very apprehensive to do something more extreme than 'a bit darker' or 'on the lighter side'. 

I can understand their concern, of course. Ideally, I'd like to do something pastel - I have my heart set on peach - and the maintenance of that colour is high, lengthy, and sometimes very expensive. I've read up on the process to get it to the base for colour, I've read up on the aftercare and it isn't easy. But I'm prepared for that. 

Aside from damage and cost, there's the other concern. I'm job hunting, ideally in London, perhaps in Asia, and unnaturally coloured hair isn't exactly deemed 'professional'. This, of course, entirely depends on what you're applying for, but the overwhelming verdict is that rainbow colours don't belong in a professional workplace. 

It's saddening because it feels that professional and creative (or different, or expressive) are mutually exclusive. 

That no one will take you seriously if you've got pink, or blue, or teal, or mint hair. 

Which is totally ridiculous, hair colour doesn't dictate your ability to do a job, be it high pressured or arty. 

I'll probably bite the bullet at some point. Parents be damned. (Not so sure about the job part being damned, though.)

Where do you stand on unnatural hair colours? Any experience with them in the job hunting department? Let me know, pleaseeee.