I feel fine about referring to myself as "an EA" in contexts where this is convenient and doesn't imply major "identity" or "ideological" commitments. And indeed I sometimes do so.
In many ways the label does seem quite descriptive of my views and career goals.
I don't feel like I identify as an EA in any strong sense, or like I would want to describe myself as such no matter the context. For me, this partly has to do how I think about EA relative to other life goals. The way I roughly see it now, maximizing impartial goodness is one of the most important goals I'm pursuing; but there are also other, more personal goals. I feel like tying my identity to just one of them would "privilege" that one goal at the expense of others, in a way that messes with my way of internally resolving conflict between them (and of course such conflicts sometimes to come up). This feels true to me even if it turned out that in some sense, maximizing impartial goodness was my most important goal, or the one I cared most about, or similar.
For a couple of months during the first year after I had encountered EA I was more in a mindset of "EA is the most important/only goal, and I can pursue other goals only insofar as they're instrumentally useful or it would be psychologically impossible for me to not pursue them". Partly this was due to bad social influences. This isn't exactly the same as "identifying as an EA", but I now think my mindset at the time was both unhealthy and instrumentally harmful for my long-term ability to do good, and so it's one key reason for why I'm skeptical about, in some sense, "emphasizing EA too much".
[I wasn't at the Leaders Forum 2019.]
It seems weird to push back against these sentences, since they're is about your personal perceptions and what you want to / feel comfortable identifying with. But these sentences seem a bit odd to me, because I think people do use "-ist" labels for many philosophies, movements, and personal practices, not just political parties or religions or things like that.
Some examples:
And I think "-ian" labels are basically equivalent (with the distinction between about what letters precede them or something like that, rather than something deeper). In which case, examples like utilitarian and vegetarian are also relevant.
Maybe your perceptions on this aren't really driven by the "-ist" label alone, but by that label plus it being attached to the sort of community of people that seem more likely to form a shared identity, shared ideological blindspots, or similar than e.g. pianists or novelists would be?