If you are asking based solely on whether one likes the sound better with or without a preamp, only you can answer that after listening to your choice of Pre.
However, if you already know you like the direct sound, but have more than one source as I do (Wadia 861 and VPI TT), and are wondering if you'd be compromising too much in sound quality for the convenience of switching sources, then I would agree with BTSTRG. The Placette Passive Pre is a good solution.
The Placette allows you to keep the Wadia digital volume at 100 (which makes a huge difference), and yet I do not notice any coloration.....at times I think I hear a coloration, but then when I A/B it again, I conclude that I'm just imagining it.
When I have a couple extra $, I may even try the Placette Active, just to see if it adds some dynamics. But if you like the direct no preamp route, I don't think you can go wrong with the passive.
Just my two cents worth.