My experience was a loss of sweet tooth permanently. Before I had a lot of craving for sweet stuff and had to fight with myself to cut the craving. After the Vipassana that craving is no longer there like before.

Apart from this one thing, there are no lasting impacts. If I meditate an hour in the morning and an hour in the evening, the effect lasts around 24 hours and I gradually revert back to my original state, so I have to maintain the meditation practice to maintain the results.

It helped me come out of alcohol and drug addiction (not after a single 10-day course, mind you). It's helped me a great deal with long-standing anger issues. I find myself much more lucid and generally more effective; my decision-making capability is a lot sharper than it was 5 years ago.

Some effects which coincide with my Vipassana practice that I would say are hard to attribute to it (but I'd be tempted) include: calling my parents more often, giving people my attention more meaningfully, an improved diet, and better results from exercise.