This is always the case when something with a cult following changes to a more mainstream style. Most old fans don't like the change and a host of new fans comes along and can't really understand what the old fans are so upset about. We hear justifications of "things change man" and "keeping with the times". Ultimately the protests of the old fans and the justifications of the new fans are irrelevant - the change happened. You either like it or you don't.
I'm pretty ambivalent towards Fallout 3. It was an enoyable enough game and was aesthetically pretty stunning. Saying that, I find it curious that the game worlds in Fallout 1 and 2 seem so much more rich despite the fact they are considerably less detailed. I only played Fallout 3 once and had no particular desire to go back and play it again once I had explored most of the game world. I have played through Fallout 1 and 2 at least half a dozen times each.
There are also a whole list of flaws I can attribute to Fallout 3 completely independently of the existence of Fallout 1 and 2 but I don't want to go into those. The only one I should mention is the combat system which is awful...but then I don't think that RPG and FPS is ever going to mix well. My problem is less with what they did to the Fallout franchise and more with Beth's games in general. They're RPGs marketed to FPS fans. I like FPS games but if I play an RPG I want an RPG not a b*stardised RPG/FPS. Strangely I don't mind as much if the game is more FPS with RPG elements - Deus Ex was great.
But yeah - I can live with the fact that it didn't meet my expectations. It doesn't eat me up inside or anything!
For those who didn't play tactics, events happen in real time similar to an RTS (you click on enemy units you want to target). The turn based element is that your character can only perform actions when he has sufficient action points to do so (these recharge at a rate dependent on your character's stats/abilities). The key thing is that the accuracy of your shots is based on your character's skill rather than whether or not you are an FPS whizz. VATS was the token gesture to fans of the old turn based but it was crap because in the latter stages of the game combat was just a case of fatal head shot after fatal headshot (until you started facing off against those stupidly hard enemies in the expansions which basically involved running backwards while trying to pull off headshots).