I agree with you on 3DS game pricing ouija, I think a maximum price of £29.99 for triple AAA titles is better and then a standard price of £24.99 for everything else. Some of the game prices are similar to PS3 and 360 prices and the 3DS one's can't possibly compare with those.
I received my console on Wednesday but had no games for it (they were still in the post), so I bought Super Mario Land 2 from the eShop and it brought back tonnes of memories from my childhood of playing this game for the first time on the original Game Boy. I think the eShop is a great idea but suffers from the same ridiculous pricing structure of the main cartridge games. There's not a whole load of stuff on the eShop and some of the "made especially for 3DS" games seem quite rubbish.
I think the 3DS came out a little too early and doesn't yet have the gaming catalogue there to make use of the 3D capabilities. But I suppose the Wii was the same on it's initial release, that just had loads of random remote-waggling, party-based mini-games out at first until people started making use of the technology and realising that you could do more with it. So presumably the same thing will happen with the 3DS, they just need to get those prices down a bit.
I've now got Mario 3D Land, Zelda: OoT and hopefully I'll get MK7 today or tomorrow, oh and I also bought Zen Pinball 3D from the eShop so I have a nice collection now.The 3D works really well on the console but does take some getting used to, if you move the 3DS remotely while playing (something that inevitably happens with a handheld device), then the 3D effect doesn't work or becomes distorted. It's very difficult not to move though when you're playing something like Mario 3D Land as the constant shifting of perspective and depth while moving round the environment causes you to naturally move the console sometimes. I'm thinking the same might happen with MK7 as you try to steer the console (like you do with the Wiimote).
The 3D level slider can help counteract this somewhat but I think overall playing in 3D doesn't work that great for long periods of time (especially seeing as the battery drains very quickly). I find the safety precautions in the manual to actually be true for once in that half an hour playtime is just right as any longer than this and I can get a touch of eye strain, so after 30 mins I put the 3DS down for a while and then pick it up again once I'm suitably refreshed.
Also, I think I should mention the incredible sound quality of the built-in speakers. They are much louder than on previous DS's and a Surround sound mode gives the sound quality much more depth. I know lots of people will use headphones with the 3DS but I just thought it was worth pointing out that the speakers themselves are very good.
I'm really glad I bought a 3DS now and although I won't be making much use of the Street Pass features as I won't be carrying the 3DS around with me outside of my house, there is plenty there to make use of.