The short version
Pathum Thani is a northern provincial landscape of universities, government offices, industry, canals and low rise communities. It suits residents whose lives are north of Bangkok and who want more room than the inner city offers. It is a poor fit for a daily central commute made on optimism.
Rangsit and Khlong Nueng are the most recognisable urban anchors. Beyond them, the province spreads into quieter roads and agricultural edges. The Chao Phraya and canal network are part of the geography, but they also make cross town journeys less direct than they look on a map.
The SRT Dark Red Line offers a route from Rangsit towards Krung Thep Aphiwat, while buses and cars cover the wider province. The train helps if home and destination line up with it. Otherwise, the last mile is the story. Families should test school roads in the morning and during rain.
Verdict
Pathum Thani is a sensible home base for a northern routine, especially around the university and rail corridors. It is not an inner Bangkok substitute. Choose it because the province is where you need to be, and it will make sense. Choose it for a theoretical cheap commute, and the geography will correct you.