I am a big fan of the food at Filomena, but the ambiance has been a turn-off for several of my dining companions. Tables are very close to one another, it can get loud, and the decorations are ridiculous in such a nice place. But I ignore all that and go back for the fresh pasta, Italian (BIG) portions, great desserts, and complimentary sambucca.
In my view, it's the best place to go for Italian in DC without breaking the bank, but only because the other Italian places tend to be prohibitively expensive.