Living in Dublin, I recommend Nancy Hands (on the north side of the Liffey) - always superb food at a good dublin price.
for sushi, aya (near brown thomas off of grafton street is good).
overpriced - shanahans on the green, the shelbourne hotel's restaurants and FXB.
most restaurants in temple bar are crowded and overpriced - the boxty house in temple bar prides itself on irish food - no! If you want to try good irish food, try outside of temple bar, which is not the bohemian quarter (too expensive), I'd recommend Mother Reilly's in Rathmines, which serves decent irish food and the best chicken wings in the city.
Also, the Purdy kitchen, which now has a branch in dublin city centre - the food is good at their other location and reviews have been good for this new venture. Lugi Malones in temple bar used to be good, but they crammed the tables in and turned it into a cafe style - for the same price at Nancy Hands above, at Lugi Malone's you get a few bits of meat and few undercooked prawns - Nancy Hands 'surf and turf' is superb.