Am I the only one who doesn’t love Harbeth P3esr?

I've always found the P3-ESRs a little smooth (hardly bright).  However, everyone's taste is different.  If you've been living with a smooth, maybe recessed-sounding speaker for many years then, yes, I guess the could sound bright.  Give them several months to "run in" and, more importantly, your ears to "run-in" to them and you might feel differently.

Common mistake buying equipment based on reviews or audience it at dealers. Now you will have to adjust your ears to them and I’m not recommending listening other equipment nowhere else because when you come back you will hate them more or sell them who love their sound. Honestly I hate their sound too so you are not only one 

since they are close monitors they need to be used closer than 2.5mt. they also need to be placed very close to the back wall. not far more than 50cm. as a matter of fact they’re more like desktop speakers than bookshelf. falcon’s are a little bit forgiving on listening distance but more or less all ls3/5’s are need to be used inside 2.5mt. distance including original rogers. I listened them all (spendor, graham, rogers, harbeth, falcon) except shun mook. falcon sounds a little bit exotic but harbeth is the best among them. additionally finish is playing an important role on sound signature. I like the rosewood’s sound.
a good low powered English amplifier might help too or a Japanese el84 tube amplifier is even better.

Lots of very strong competition at their price point and they are very small compared to many so one better really take to what Harbeth tends to do uniquely I would expect.  That would be vocals, which is very important thing to do well. 

I have listened to the P3s and never found them to be bright al all. Maybe need more time for break in , or something else causing the brightness. Either way, I hope it works out for you.