"regardless of preference" is correct and usable in written English.
It is used to describe a situation that is not affected by someone's individual preference or opinion. Example sentence: The candidate was chosen for the job regardless of preference.
Thus, during the testing stage the animals consumed any food they obtained regardless of preference, indicating they, in contrast to their behaviour during training, no longer discriminated between the qualities of the rewards.
Participants needed to agree to randomisation regardless of preference, having not yet completed DAFNE training or equivalent.
Regardless of preference, discussants from both countries identified that paying for nutritional advice had benefits, including increased commitment to the service and motivation to follow the advice.
Regardless of preference to one gender or another, you have the right to be sexually "different".
Even though this is universal to any prospective dating to a certain extent, regardless of preference, body size, or sexual orientation, fat individuals, fat women or non-gender-conforming persons are at especial risk.
But here's the main thing: regardless of preferences or tastes, people don't go to sporting events to hear music.
In addition, an ideal metric for preference-based methods should evaluate whether the obtained solutions truly reflect the preferences, regardless of their preference modeling types.
The questionnaire consisted of two parts: the first part on personal preference and the second on perception of norm (what is perceived as best for the Saudi society, regardless of personal preference).
Asked, regardless of personal preference, who they expect to be in No 10 after the election, 58% say Cameron against only 28% who say Gordon Brown will still be in power.
Regardless of your preference towards power pop and psyche-rock, it's impossible not to applaud Californian musician Ty Segall for his prolific output (which, as one Guardian writer surmised, works out at averaging around two-and-half albums per year since 2008).
Also, it recently made iWork available to all users regardless of hardware preference via iCloud on the web.
