I can give you my German perspective. My oppinion is that you should indeed leave! Unlike many other Germans, who quite arrogantly say that the UK is a burden on the EU, I think quite the opposite. The EU is a failed project that is slowly becoming a burden on the UK, not vice versa.
There is a myth going around that the EU is somehow necessary for efficient cooperation, when the reality is literally the opposite. There are ZERO trade or policy deals negotiated by the EU that could not be negotiated much more effectively independently.
Furthermore, the UK is not bound to the Euro, which makes a BREXIT more managable than a DEXIT or a FREXIT. (The latter two would be the fall of the EU anyway). What started out as a noble project is a dangerous bureaucracy that is becoming too big for itsself.
Im looking to study in the UK, which I would benefit from as an EU student, but I cannot advocate something that is bad for the UK. For centuries the UK, England to be exact, was to mainland Europe what the moon is to the earth; an extremely important counterbalance. During WW2 it remained the last standing democracy in Europe and in the 21st century it has the chance to become the first democracy in Europe to kill a bureaucratic monster.
Oh, and no, Europe wont collapse and WW3 wont break out because the UK leaves the EU..... as some seem to think....There will be negative effects for the UK, but the positive ones will outweigh them.
USE YOUR CHANCE BRITS, SCOTS, WELSH and N. IRISH!
PS: Germany is the most oblivious country in the EU. Whether it is the refugee crisis, the attitude towards the EU or our foreign policy. We will be the first to respond, but the last to admit the actual problem. And it seems that most of us are proud of that mentality... for some reason.