Maybe I just don't care what other people say, but I personally haven't really noticed anyone complimenting the first two games that obviously haven't played them. But there are always going to be posers out there, especially on the interweb, so meh.
As for me, they were great, but by no means my favorite back then. I would say they are better than the third, but at the same time I would say I've enjoyed FO3 a lot more than the first two, mainly because of a HUGE lack of competition.
Never played FO: Tactics. No desire then or now.
Anywho, if we want to get into a series that's been HUGELY over-poser-fied, check out Final Fantasy. Every single fan as of late seems to think just because they played number 7 or something, they own the entire series. Again, who cares? Just feel a little sad for them because eveyone who's played them from the beginning knows IV will always be the best.