Different sensations?

There are a huge range of sensations. A lot of people say no two aneros sessions are alike. I mightn't go quite that far, but even a session that you could call fully successful and satisfying could be totally different to another successful session.

Two of my best sessions were very different. One of them was an impossibly long orgasm, that felt exactly like the peak of a normal penis-centred orgasm (only at 150% intensity with no major contractions). The other was centred in my prostate and it was like a buzzing electric bliss that I almost couldn't stand.
I've had other experiences where it felt like I was suspended in that moment 2 seconds before ejaculation, which went on and on, and though not intensely orgasmic, it was pleasurable in a really longing, erotic, aching way. Then other times, my PC muscle is awake and kicking, having its own little spasms that feel like orgasm spikes.
I'd call them all peak experiences, but they differ vastly in nature.

I can validate everything @Clenchy just described! I get all the same feelings in no particular order or predictability! It just happens! Such sweet agony!

Nice.