If I had to describe Tokyo in one word it would be "Convenient". The ubiquitous 24hour convenience stores, wonderful public transport, shops selling every service you could imagine, and vending machines selling six packs of eggs. The last being something I discovered while riding in one of the less densely populated parts of town.
Admittedly I don't often wake up at 3am in the morning and think "I need eggs", but if I do I now know where to go. Its not using the services that matter, just knowing they are there if I need them. But to be honest, I think the watermelon vending machine I found in Nara is still my favorite.