I get the filler you're talking about, Naruto is just in a world of its own in regards to filler, there's only a couple of arcs which are actually decently written, the rest are wastes of time, I preferred the anime when I watched it (till like episode of 10x of shippuden(was reading manga at same time) - ignored alot of filler near the end of the original naruto series) , You can research up on filler arcs if you want and watch any that interest you, but they aren't standard filler in the original naruto series as everybody has re-iterated and are largely considered wastes of time. Here's a pretty good list :
http://www.narutoforums.com/threads/naruto-shippuuden-filler-list.501381/#post-23201968
It seems the shippuden filler is alot more lore based, compared to the original naruto filler,it seems more like the filler you enjoy, but the original series filler is mostly shit and I will 100% say don't watch that.
I'd say watch it but ignore the filler in the original naruto series at the very least and go back and watch the filler after unless you really want to see some of it, the manga readers never got any of the filler and it was a satisfying read for the most part. Some of the movies are great though so make sure you check those out.
Also, I haven't watched the original berserk anime but people say it's not a great adaptation, the latest one is just bad though. The berserk manga is great though, but some parts are just so brutal(I thought people were overhyping this part and I still do to an extent but there are moments which are just fucked.)