Considering you'll never miss the thinner/lighter iPad2 your new iPad is a pretty big leap. I have a few questions!
Do you notice the speed improvements?
Yes, everything is running faster, opening faster, apps not crashing from memory issues etc...
How are you liking the new Safari performance?
Not sure but I hated web browsing on ipad1 because of tabs always reloading. Now it seems I can have at lease 4-5 tabs and they hold their content so I can switch. Also page loading (all over wifi on same network as before) is now what I expect from my OSX Macs. Therefore, I have started to enjoy web browsing and with the Retina display I've found I can easily browse in portrait orientation which I like a lot.
Are there still grumbles you have from the original iPad that apple have yet to solve?
Slow charging, and this one is even slower!!! But of course that is expected. I'm just used to my MacBook Air and iPhone4 charging up in an hour or two, not like 6-8hrs or not charging while using apps.
Are you happy that you skipped iPad 2?
Yes, although I feel I would have solved a lot of my ipad1 headaches with ipad2 but I really don't want a new one every year. 2014 ipad5 here I come!
Was the upgrade worthwhile?
Yes, I'm very happy and have no real complaints except for the long charge times and not being able to charge while working on it.
Do you think you're likely to skip more than one more generation of iPad before jumping back in?
I will almost certainly skip ipad4 and will see what ipad5 brings. I think that the problem is new apps and iOS starts to get really slow once your 2 gens out so probably have to upgrade every 2 years if you want to keep upgrading iOS also and of course new apps. iphoto doesn't work on ipad1.
Any other thoughts/opinions you want to share?