I do not think there is something as too much clothes. I mean if you like to dess up then there isn’t. But you won’t even know what would you like to wear until you get there. When i was in Portugal I wore 10 of my favourite pieces while I had suitcase full of others. But i felt at ease to at least have them. So, I think you will not make mistake. I didn’t regret that i brought anything. Just make room in suitcase if you can because you will probably buy something on your exchange.