Well, I'm still relatively low level (being a casual player, I don't tend to level very quickly), but thusfar I'd have to say my favorite part of the game has occurred very recently. Things *working*!
17BLM/8RDM in the Dunes, got into a party with:
Everyone polite, everyone receptive to criticism, and everyone concerned about the lack of a secondary 'voker. Set up the standing orders quickly. I enfeeble, the other 2 BLM nuke. PAL does his job. WHM does her job. SAM is the puller/renkei starter.
Got our renkei set up quickly, and pulled a few Snips to get a feel for whether we needed to rethink this mage-heavy party layout.
Aside from one of the BLM overnuking and pulling hate a lot more often than he should have (still, at 16 without a sub, you can't expect he'll be flawless ;P ), the party ran like clockwork. After an XP chain 4 on Snips, we moved up to Flies and Gobs.
SAM pulled, PAL 'voked, attacked, and cast to hold hate. WHM healed as necessary. The 2 BLM nuked (one a bit overboard, as I mentioned, but they did what they were asked). I enfeebled, threw a nuke, then watched for the renkei to start, so I could burst without pulling the hate off. With a SAM in the party, we'd renkei on *nearly* every other pull.
After watching me burst 4-5 times, one of the BLM levelled to 17, and had the Blizzard scroll on him, ready to learn. The very next pull, he burst with me. Wonderful!
It was a darned shame that party had to disband - we were having a hell of a time, and making rather massive XP on chains. I've had my share of horrible Dunes parties...this was refreshing and fun - additionally, everyone levelled at least once (one BLM twice!)
Alternatively, I've taken to trying to teach the less-favorable Dunes parties how to renkei. It's quite satisfying to get a party of previously ignorant WARs addicted to renkei/bursting ^^