What I normally do is lookout when u r linning up at the immigration line watch which immigration officer is quick in stamping the passport. Some r slow n ask too Manu questions whereas some officers don't bother asking questions n just stamp the passport n let u in however now with the new automated check in online u will get a reply before entry if u approved to enter n your duration of your stay
It's all about the location.i stayed many hotels so u don't want walking to catch the BTS .in pattsyya red planet hotel is the best location to all things u can do n see.in bangkok Le Fenix hotel is on soi 11 very gd location