In our generation now , do you still say PO and OPO??

Proudly saying Yes of course :) In our home..most of the time. But outside our home..it depends. ;p

Well I grew up using Po and Opo. I'm 21 now, I still use it up to now. even on people younger than me. I have 2 brothers, one is a teenager who also uses po and opo regularly. another is turning 6 years old and he too is using po and opo regularly. The problem with teenagers now is not the modernity. It's not the technological advances, it's not even the westernization. The problem is how they were raised. Some parent's didn't instill this behavior that's why their kids lost this age-long tradition. Look at those not born and didn't grow up in Luzon, they don't use po and opo (ever since) because they weren't raised that way. That's what's happening now. Elders who are supposed to enforce this don't.

I dont know much tagalog but whenever I can use it I say PO to older people. I always try to be respectful no matter what language I use.

I'm not from Luzon so I don't say opo and po as much as the tagalog people do. In our dialect we don't say opo and po where we are talking with an older person. There are some circumstances that we say those words. When one of my relative from Manila went to visit us I did use those words as a sign of respect. I feel uncomfortable saying those words because I wasn't use to saying it in our dialect. I do hope that the new generation of Tagalogs would still use those words. I think until now Filipinos still use that word when talking to an older person. That is a good sign that we are proud of our culture.