Usable Space & Location
When visiting a garden-level property, keep in mind you'll be living in the apartment. It sounds simple, but it can get complicated. Don't be fooled into planning your life around the space based on your fantasies.
Imagine not only your dream activities -- cocktail parties, or writing a novel on the patio -- but also your daily routine: Will you use that breakfast nook? Will the patio see that much use across the seasons? Analyze the space in terms of your probable activities, and you'll see more easily whether the space is right for you. It's possible you need more -- or less -- space than you think.
Will you really avail yourself of the nightlife, restaurants and nearby attractions? How many nights a week will you come home exhausted and simply want a place to lay your head? Location, like any other selling point, is only worthwhile if it has meaning for you.