Well it's been a few days now and I've finished the game :)
Golds everywhere!!

I have still yet to unlock one lightweight player and a small kart. I can only guess this is through getting one, two or however many is maximum stars on ALL the cups. This is seeming a little impossible but I spose I'll get there ;)

I'm quite glad it hasn't finished on all golds actually, like the N64 one (I think I got all golds on double dash but I wasn't a big fan of it so I don't know if I unlocked everything). I still look forward to getting online and having some other people to race against :)

This weekend I've been mostly playing... Mario Kart.

I played it quite a bit when I first bought it, then some other games got in the way and it's been sitting idle for a while.

I had trophies in both 50cc (all gold) and 100cc (2 silver, dammit) and was a bit stuck with 150cc.
I now have trophies in all of 150cc but got a few golds to achieve.

My issue is working out which vehicle is best for each set of tracks and for me generally. I've had some trouble getting used to the bikes but they are certainly superior in some cases.