Alexander, I've seen approximately 5 episodes of TOS now and watching them in production order. I can't say it's better than TNG, DS9 or VOY but as much as I love ENT, I'd have to say TOS is better..........argh I hate putting ENT down but something about that show, even during season 3 and 4 isn't quite right. Out of curiosity, what is your favourite Trek? Mine is VOY.
I must admit, I do not have favorites. I've just started seriously watching and of the different series, and so I can't accurately say that I like one over the other. Right now, though, I must say out of all the different Star Treks that I have sampled, TOS is winning in my polls. It's not put together quite the same as a more modern series is, but it is endearing. I like it