The same happened to me 3 years ago when I planned to do a whole rewatch. 2002 bored me so much and took me too long so I gave up. I have always said 04 to be my favourite, a lot of that is probably bias due to visiting the house being my earliest memory. But for the beginning it was rather slow, the characters are pretty one dimensional and overt the top but it does make me laugh. I think the cast bounces off each other better than 02 did, several people do not like each other and theres more drama than any other previous series.
After you wait for Paul to star stirring it is enjoyable. The worst part is the gender split and how blokey the boys are. But really the cast is humorous. Ashalea is a stand out for me, very Reggie type but not as unique as Reggie. She's probably more of the prototype of this Skye/Tilly archetype. Watching Kane's eviction and Gretel pretty much lets Kane know that all the boys stuck too each other too much and that he only nominated females.
Trrevor, Ryan and Paul do speak with the women but for Wesley and Kane they tended to stick to the boys and it was almost like watching younger guys in a high school pack trying to impress the larger older boys for status. I think it was Bree who said the boys in this season were very much boys boys and the girls were girls girls. Pretty accurate I'd say. It was more fun watching Sara-Marie bounce from billy silly with the boys and serious with the girls. I think what the 04 cast lacks dynamic attributes. Bree is a straight shooter, Paul is a shit stirrer, Ashalea is dumb and so on and so forth. It's a lot of the same thing repeated every single episode. There are moments of learning about housemates on a deeper level but for 75% of the time they are all lately one dimensional. But that is probably more foul to the editing department.
My progress is largely due to isolation, but normally it wouldn't be very hard for me to watch a week's worth in a day. The channel 9 seasons will probably take me longer, but then again there is no extra shows so maybe the total time balances? The way I planned this out was to hopefully finish 2014 around the time the 2022 season is due to air. I hope this is the case so I can jump straight into it. If theres time in between I may contemplate rewatching 2020/2021 for completion sake. But maybe no. I will more than likely watch BBCAN and then one day soon I do hope to finally tackle BBUK. One day I will. One day.