I am a Starbucks fanatic and I visit at least one Starbucks location a day. I know many Baristas and I also know they move from location to location quite a bit. With all that being said, my favorite Starbucks location, today, is the Lake Mead/Buffalo location.
The staff is competent, cordial, and extremely efficient. It is one of the busiest locations in North West Las Vegas but they are always able to get you your drink quickly.
It is equipped with a drivethru and a rather large out door seating area. The indoor seating is usually crouded and not the best for large groups. There are always patrons sitting down in this location which tells you nothing but good things about the location.