Re:Jonas

Jonas was OK, but I think he wasn’t a worthy substitute for Daniel. Dr. Jackson really sucks from time to time, but he’s still irreplacable, I think. (+ he’s my fave SG1 member)
Jonas somehow did not develop any interesting personality. Daniel Jackson is the one who seeks compromises and annoys the others (sometimes viewers as well) with questions like “Do you think this is a right thing to do, Jack?” or accusations like “That would be a genocide, Jack…” and such…
And the fact that he often goes little too far, as well as his enthusiasm, is an important part of his personality.

Nevertheless, I don’t quite understand, why they did have to get rid of Jonas, when Jackson returned. I certainly wouldn’t mind, if he stayed at SGC (some other SG team or something like that). Concerning Jonas Quinn, last episodes of season 6 were pretty promising.
Maybe the writers were just too lazy to find a place for him in SGC…;-)))