Which Barcelona accommodation you choose depends on many factors. Your main factor could well be your price range. Barcelona has a wide choice of accommodation to suit all price ranges from simple bed and breakfast guesthouses to large expensive hotels.
Another factor you may take into consideration is what value for money am I getting.
With so many hotels competing for your custom you will no doubt get top quality service with excellent facilities.
One more important consideration is the location. Would you prefer to be in the city or in the suburbs? There are some excellent hotels available in the suburbs and with the very good transport system that Barcelona has the city centre is only a short journey away.