My situation resembles that of 9/30’s OP with one critical difference—although the agent responded enthusiastically to my full, we’ve never worked together before and he has yet to sign me.
Recently (well, in publishing years, anyway) I queried you and you rejected me in a way that suggested I had good writing and a good project, and should keep on querying. Well, I did, and was fortunate to get a nibble from someone I’d rank (along with yourself) in my small group of dream agents. He asked for a full, which I sent promptly. After three months I nudged; he responded with a long email wherein he praised my writing, included a list of editorial suggestions, and invited me to revise and resubmit.
The edits, which ran about two pages single-spaced, were brilliant. The more I revised, the more excited I became. Six months later, I sent him the revised manuscript and heard . . . nothing. I waited three more months, then nudged tactfully. He responded by thanking me for the rewrite and my patience; he apologized for the delay and promised to get to it right away.
Since then I’ve nudged him twice more at three-week intervals, with the same result. And, boy, do I have questions. But unlike your OP of 9/30, I’m not yet his client, only a prospective (and tremblingly hopeful) client.
Is it okay to keep nudging him? Is every three weeks about right?
Is there anything more I can say or do to move things along? Have I already done too much?
Does he maybe hate the rewrite and is putting off telling me because he’s a nice man and as you pointed out in your original post, nice people hate writing rejections?
Sigh . . . Since you have been so unfailingly kind to me for so many years now, I’m hoping you’ll have time to consider this variation on OP’s theme. Like you, this agent has also been kind. He’s put a lot of unpaid time into my work and his edits have been spot-on. I don’t want to alienate him by pressing too hard. What should I doooooooooooooooooooooooooooo?
You now have a beautified, whipped-in-to-shape manuscript.
What you do is query it.
Agent Lollygag has now had a couple months to get to it. He's not dawdling to make you crazy (the way I like to do); he's probably got a lot of stuff on a higher priority deadline.
You keep nudging him but you do NOT KEEP WAITING for him.
You get that query back in rotation.
When you get an offer, you let him know instantly and give him a week to get back to you**
Nudging every three weeks is a lot.
Nudging every six to eight weeks is better.
I sympathize with you; waiting is hell. But I sympathize with Agent Lollygag too. I have a stack of requested fulls glaring at me right now. The chanting from the mob gathering in my lobby is starting
to take on chilling tones (I was hoping they'd all go home for NaNoWriMo but no luck there.)
**I've had people let me know of an offer,
only to say they have to respond within a very few days.
That means I have much less opportunity to read the ms
so the author gets a pass, rather than a competing offer.