Is the expansion something I want?
That's up to you, if you're enjoying the game and want more than that's most likely a 'yes'. A fairly comprehensive list of what's in the expansion can be found here, I think they've pretty much revealed all the big ticket items;
https://heartofthorns.guildwars2.com/
The real question is the ultimate edition something I want? I would only grab it for the gems and the character slot, which is why I would skip over the deluxe since I think getting the base + slot in the gem store is cheaper. I haven't really looked over the gem store; is there anything in there that people might consider essential (bank slots?) Is the Living Story stuff worth it?
In general, the mini, finisher, glider skin and such aren't really worth it. If you want the character slot only, get the basic edition and run to Best Buy or Gamestop and by a $15 gem card. The Ultimate Edition is only a deal for the gems because you're getting them at half price. If you're okay buying it, go for it.
In terms of gemstore items, I would highly recommend bank tabs (maximum of 12, including the one you have), character slots and the Salvage-o-tron (for the convenience). Everything else is cosmetic.
The Living Story stuff is up to you; I personally enjoyed it but if you're not crazy about the game's lore or you're okay reading the cliff-notes version online, you can probably skip it. There's some neat rewards and cool fights, but nothing you can't live without. Keep in mind that you need the Living Story unlocked for the Carapace armor skins if that's something you'd like.
If you're not sure, buy the basic edition and a gem card for your character slot needs. You can always buy the Living Story later (and it might get discounted later as well).
I'm having a lot of fun just jumping around. fun to just explore and see the scenery. I made it to the center of the main town I believe, it was a really nice garden.
Beautiful.
Working on the story quest now, solving crimes!
That's
one of the main towns, though one of the prettiest. There's one for each race, Divinity's Reach is the Human capitol.
You're gonna love Lion's Arch when you're level 35 =)