banjo kazooie and tooie are great, but i usualy stick to kazooie. The problem with tooie is that it makes you backtrack a lot, and something that always bothered me is that you do not get inside panels at the beggining on the stage like in kazooie. the first time i got into mumbo's zone i was really confused, i thought it was part of the map. also, i got so mad when i reaized that i could only do 4 out of 10 jiggys in one run in that level, while in banjo kazooie you could make them all i you wanted.
i'm also a collect a thon guy. the only game that i couldn't finish completely was mario sunhine... stupid blue coins, there are like 30 of them in each stage! and they are not stationary, it depends on the shine number you select. i got them all once, but got into final exams and all that and forgot to exchange them. i still wonder if the "save" is still in the memory card, even though i remember starting it all again once more.
also DK64 was a nice collect a thon. collect 60 something bananas, 201 golden bananas, two fairies per stage, the rare and nintendo coins and the battle crowns. i know i'm still missing something.