Slow down, Marco...
I was there last year for just three months (but I would have
preferred at least 2 more) working at my Master's thesis.
Now I applied to the PhD program hosted in the Institute I had been working in,
and am waiting for the outcome. I'll probably head back there in August if they admit me
with an adequate fellowship/scholarship, but I shall make up my mind
whether to accept their offer or other PhD programs in France, Germany and Australia that I applied for.