absolutely the clue is in the name - you really need to have a guild for it to be worthwhile. Even so I found GW2 kind of grindy.
You found it grindy? I found it easy to level. Just as easy to obtain best gear in the game (at least most of it). So I ran out of things to do rather quickly.
WvW was nothing compared to good ol' DAoC... It is ofcourse unfair to compare any game to DAoC but they did so themself.
PvP was alright but not as fun as GW1 used to be and my friends rather quickly lost interest in the game and PvP gets kinda doll when you're not playing with friends.
On the bright side the whole game experience was very smooth and I had a good time just leveling even though I was soloing most of the time. I wouldn't say it was a complete waste because I had a decent amount of fun but it didn't have that long lasting/keep on playing factor that a good MMORPG should have (imo).