Reading Opponents

Poker is not only about the cards you hold, but also about understanding your opponents. Betting patterns, timing, and reactions can reveal a lot of information during a hand.
What is the biggest tell you notice from other players?

For me it’s usually bet sizing and timing. A lot of players suddenly bet big when they’re strong, or act too fast when they’re bluffing.

I mostly play online rather than live, so I pay more attention to betting patterns and timing tells than physical reactions.

Things I notice a lot are players who limp/fold too often — I’ll iso them pretty aggressively. Same with blinds that overfold; if they’re giving up too much, I’m stealing constantly until they adjust.

Timing tells can be useful too. A really quick check often feels weak to me, like they’ve already decided they don’t like the board. On the other hand, sudden long tanks from usually fast players can sometimes mean they’re deciding how to extract value rather than whether they should continue.