My favorite area for staying in Paris is the St. Germaine de Pres area. It is the most convenient area for those staying for a few days and for those staying in the wintertime, when the weather is often cold/inclement. It is close to many fine neighborhood restaurants of all price ranges, metros, all the museums, shopping, Christmas markets, central to tourist sites, etc. There are a number of nice hotels to fit your budget in that area. My favorite is the Hotel d'Aubusson.

I like the Victoria Palace as well, but it is a little farther north in Montparnasse and more inconvenient. I like to stay away from the Arc de Triomphe area or Champs Elysee as it is too touristy. The Marais area is better in the summer/spring..The Opera House area is very nice, but hotels are often pricier and the restaurants are more expensive and not neighborhood restaurants. The Eiffel Tower area is nice but more of a residential neighborhood and I felt I had to walk to more places for dinner and sightseeing. It is better in the warmer months.

Most of the hotels will have adapters to lend you and there are lots of stores where you can buy them if you forget them. The French have the latest in electronics stores. I usually just buy a new hairdryer or flat iron there and don't worry about converters. If you have an iphone, just buy a different plug there at their Apple store.

If anyone needs a tour guide for a walking tour, I have a fantastic one for Paris.

I can also share some favorite restaurants.

Hope this helps.