Never actually stayed at avy of these places but from quick searches on Google.
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">QUALITY SUITES BANGKOK AIRPORT</font>
No longer owned/managed by Quality
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">(Is it within walking distance of the airport?- just spending the night before catching an 8:00 am flight to Phuket.</font>
Approx 2 km away from airport. Take a taxi. ATMs are located just outside customs. If looking for cheapest fare go upstairs to departure and try to catch a taxi just after they drop someone off.
rough map
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">CORAL RESORT - Phi Phi Island
Is it nice? Suggestions and recomemndations for scuba diving, nightlife, restaurants, please. </font>
no idea.
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">NARAI HOTEL im BANGKOK?
How far from airport?
Is it a nice hotel?
Restaurant recommendations?
Reputable tailors nearby?</font>
approx 30 km from airport on Silom Rd.
Have not stayed there.
Eat any place where Thais are eating. They will know what is good. If they avoid a place you should too. Best food is often had at the street vendor carts.
Reputable tailors? In Thailand? I am sure there are some. If you find one let me know. Make sure you allow plenty of time for extra fittings. DO NOT ALLOW TUK TUK to take you to tailor, or gem shop, or .... give them defined destination and determine fare before getting in.