Should an amp have a "personality"?


I currently have a SimAudio W-7 amp.  If there is a word to describe its sound, it would be NEUTRALITY precisely capitalized.  I mean it is neutral to a fault.  It's NOT warm, or bright, or analytical, or sweet, or anything that might be misconstrued as a personality.  It's just "IS".  It has nothing that would offend me but nothing that is endearing either.  I suppose some people may like this type of sound.  I also have another SimAudio Moon W-3 amp, and although it is neutral, but it has a distinct personality of being slightly forward, slightly upfront and ultimately more interesting to listen to.  

At this point, I am a bit disappointed what the W7 is not "FOR".  I want its sound to be FOR something be it slightly warm, or forward, or a touch bright or something that is a bit interesting even if it is a flaw.  It's like a politician who wouldn't say he's for something at the risk of offending his potential voters.  

PASS Labs amps are known to be a bit warm in the bass along with all their class A type of sound just as tube amps but they somehow make music sings.  
andy2
In rereading the OP, it sounds like “neutrality” actually means “boring”. Is it also “transparent” to source and speakers such that whatever the end product is truthfully reflects the character of all the other components in the system, regardless of how forward, laid back, strident, warm, fast, etc. or does the W7 always sound “neutral” regardless of what upstream or downstream?  If the later, then I would say “neutrality” is a problem.
Neutral, Natural,  what is it really.  I've had different amps with near identical frequency response,  yet one amp was fast, dynamic, while the other had flow & rhythm.  I've had others that sounded excellent with a perfectly flat speaker,  change to another perfectly flat speaker that had a very different load and it sounded different.  
Amps personality changes with different gear.  There is something to be said for synergy.  
The nice thing about Audiogon is that you can get some nice used gear at a good price if your patient and ultimately sell your amp if it isn’t performing the way you want. As you’ve noted you’re interested in tubes. . . If your not listening at ear splitting volumes you may be able to get a nice tube amp that can sound great and perform with your system. It might be worth a try.

I’ve tried a few amps and noticed that they all had different sounds. My ultimate goal is to project exactly what the performers played so I opted for amps that have high dynamic range and power and an extremely low noise floor. As Inna and others have said the music needs ultimately be engaging. 

Other things that that could be an issue is your room. I’ve found the biggest impact on sound quality is speakers and then a close second is the room, third would be my amps. I hate moving because I have to look at a ton of places to be able to fit my stereo / home theater set up in a room with good acoustics. Unfortunately that quality isn’t located on a listing. You may have some room nodes at the critical middle listening range that are sucking the life out of the room/music. You can try to move your speakers into the room away from walls as much as possible or get a little more technical and get a basic USB Mic and use Room EQ Wizard to see that it looks like. Some time investment in learning to read the room will help you to know where your issue is or if there is one at all so you know if you’re chasing down the correct rabbit hole. 

-Steve