Would you be so kind to reply my question as you seem to know this topic very well, unfortunately I cannot say the same thing to some people who reply here to others.
I have history of staying longer in Thailand on tourist visas, though I have a new passport (only visit to Lao).
Never overstayed, never was denied entry but I were stopped twice in the past for a talk (once at Aranyaprathet 6 years ago)
I am going to stay in Siem Reap for 10 days and then return to Thailand
I have Multiple Entry Thai Visa now.
May I have a problem at Aranyaprathet/ Poipet ?
I was also thinking about Don Muang but I am not sure it's better. I think they have similar reputation.