1. My favourite puzzle is 3x3, not because it's the original one, but I prefer it for the variety of ways you can solve it (sure, there are a lot because it is the most popular one, but they're still a lot more than any other). It's always nice to hear about new or weird methods and using them. I don't usually talk about the methods I try because I don't feel an expert on that. Other than different methods, there are different ways to solve it: two-handed, one-handed, or even blindfolded and with feet (ok, the last one isn't as good as the other ones, I have to admit it). I really enjoy solving it one-handed as it gives you more opportunity to use smart tricks to influence the next steps thank to the easier look-ahead, and 3BLD is just so cool. I personally don't practice FMC but that's an alternative. I know that you can solve OH, BLD and WF (with feet) many other puzzles, but one-handed solving is so much smoother and easier on 3x3 and 3BLD is challenging but not as much as bigger cubes.
2. My favourite cubing experience has to be my study trip to Malibu. Last month I went to stay at Pepperdine University for 2 weeks with 30 other students from my school (who I had never even seen before tho). We went to a famous city or tourist attraction every second day (eg: LA, San Diego, Las Vegas and many others) so had to travel a lot, which gave us a lot of time on the bus. While casually talking to each other, someone started talking about the Rubik's cube and we discovered that basically half of us were cubers. Some were sub-20, others had just started out and some just knew how to solve it. Hanging out with them was fun and we kept cubing together even at the airport (I remember that scene: walking past our gate you could see a bunch of guys constantly solving Rubik's cubes and weird shaped puzzles, like megaminx; it was so funny to watch). One of them had 10+ cubes with him

. We helped and learnt a lot about each other, we even started to teach the others how to solve the cube and they practiced it during the 10 hour flight to Paris. Now you understand why it has to be my overall best cubing experience.
3. The first thing that comes to mind is profile posts: I would increase the character limit because it's really annoying when it says you can't post what you wrote. It's also annoying the fact that you can't edit profile posts: that's most annoying when I make typo mistakes and I can't correct them.
Also, I would encourage the mods to do deal with trollers
a little bit better, as some bans didn't make much sense and some people who deserved it never got banned (or it took longer than it should have taken)
please don't ban me. The last advice is a bit rough, I know it, but it's hard to give specific guidelines and thus I understand why the problem persists.
The one about profile posts is easier to fix so go for it if you can (I had to pick one)
I hope I didn't copy anyone. I would have liked to have more time to write but I have to go to bed.