If YOU want to do it mate, do it. I have no doubt that there are people who look at CJ's car and ask why, yet I think it looks great. If you go green, you will have the same. As for resale value, if you change the car in any way from standard, you could affect the resale value.
Yes you will narrow your resale market, but then you may find someone who will love it and pay over the odds because they would rather have a car in a different colour as opposed to a regular colour like silver, red, black etc. Just long as you don't expect to recoup the respray money come sale time.
I have recently had my MR2 resprayed in a green and it has really divided opinions. I had some friends look at it yesterday and for the most part they thought it looked amazing, and great that it's different. Yet one friend of mine simply couldn't work out why I did it ! But I did it because I wanted to, bollocks to resale and all that Oh, and I had three people take pics of it on their phones whilst it was parked up for half an hour at Tescos yesterday.
It's a difficult choice mate, and an expensive one to get wrong, but it's your car. If you like the colour then why not !!!
All the best mate, it's not an easy decision
Matt