No, there is a fun factor, it's called never playing RPGs before, then playing them. After you beat one or two, they get really really boring...
The same with me when Pokemon Red came out. My friend had it and I played it a few times, it was like dope. But then I got a gbc and red version.
The only rpgs that I have beaten to date are like only a few.
Every try Seiken Densetsu? That game rocks so much! I got to like the very last guardian beast and stopped playing, But I'm gonna start again.
I'm going to have to disagree with you. RPGs aren't just fun because you haven't played them before. There are elements to RPGs which make them fun. Whether it's story, romance, skills, bosses, systems, there is always something which makes them fun that isn't just because you haven't played an RPG before. Chrono Trigger, Final Fantasy VI, VII, Tales of Symphonia, Tales of the Abyss, Skies of Arcadia, Betrayal at Krondor, Lufia 2, Shining Force 1 and 2, Fire Emblem games - these are all fun, and obviously most of them weren't the first RPGs I played. That being said, there are RPGs I didn't like (for example, FF XII), but it's not because they are new, it's because they're uninteresting.