The trouble with Italy having the Euro is that it is so much more valuable than the lira ever was and that they have no control over its value.

At present Italy is not exporting enough and importing too much, the higher value of the Euro acts as an incentive for Italians to buy from abroad and disincentivises foreigners from buying goods from Italy. To correct this a country would devalue it's currency in relation to others, but Italy cannot (Portugal are sufferring from a similar problem). This is one of the major flaws with the single European currency. In countries with their own currency one region can support another less profittable one (for example: South England supporting Scotland), but this does not happen in the Eurozone because it is made up of several nations. One country is unwilling to fund another struggling one, as it has no incentive or obligation to do so, this results in countries like Italy, who have seen their currency jump in value, struggling and ending up with giantic trade defecits, resulting in stagnating growth and massive amounts of borrowing.

Personally I don't blame Eurozone citizens for wanting to go back to their old currencies, although the Euro is a good idea in principal, it was foolish to introduce it without some sort of framework to protect countries like Italy. The USA didn't have a single currency for quite a time into its existence; the EU are trying to create a superstate from the top down rather than the bottom up, which of course is leading to its failure.