All that really matters is that you love, respect and care for each other (or whatever the Thai equivalent is). Values are way more important than having identical interests anyway.
Obviously, if the younger partner wants to go out drinking four nights a week and the older partner wants to stay in and read a book, you're going to face some challenges, but women in Thailand seem to be a lot more into working and spending time with family from a young age. (Probably because they don't get things given to them as easily as their Western cousins.) Drinking and partying is a pretty big red flag anyway, for some.
And yeah, you could have "click" with someone half your age, then find someone your age that you have nothing in common with.
The "nothing to talk about" is a cope anyway.