I'll be the first to admit that there can easily be a fine line between these 2 things and I'm waffling between assigning the correct term to someone who is a candidate for a job I'm currently hiring for at work.
I'll start by saying that the role is a sales related position so some aggressiveness and persistance is actually important but geez... this guy is bordering on too much.
He called me 3 times on my cell phone during one day to express his interest in the role. (I was in meetings so he called back a couple of times AFTER leaving his initial message). When we finally connected, I asked him to email me his resume. Which he did. Then the next day he called to make sure I received it. I told him someone from HR would be in touch within "a week or so" as a first step. 4 days later he emailed me that he hadn't heard from anyone yet. Then I received another follow-up email after he connected with HR.
There are a number of candidates who will be interviewed by HR before I ever get directly involved with the process. While I certainly appreciate how attentive and interested he is in the role, I'm not sure if he's bordering on "annoying aggressive" or "good aggressive" at this point??!!
Re: Difference between aggressive & overly aggressive (ie. annoying!)
Hey may be desperate, or he may feel, or be getting advice from people, that you "have to be persistent". I'm in HR and I get people calling me and applying for roles all the time.
I'm much less influenceable than people might want out of an HR person they're calling about a job, I'm sure. If they call and ask if I received their resume, if they actually get me on the phone, I say, "Yes, I received your resume. Thank you for calling. If we have interested in pursuing your candidacy, you will hear from a recruiter in the coming weeks. If we do not, then you should not expect to hear from us. " Calling me constantly (or godforbid, the constant calls on my call log but never leaving me a message!) is not going to get you any further up the chain. The fact is, though, everyone who does this either does it because THEY think it's a good idea or someone told them it is, and they have no evidence otherwise.
But... I don't recruit sales staff. Maybe if I did, I'd view it as a positive. Only you would know if this kind of behavior, if perpetuated on the job with potential or existing clients, would make him a "good fit".