Another miss conception sterio type that porn has trusted into the minds of guys. As I'm lead to believe, the only t-girls who can cum thick white strands are the "shemales" from porn. Now that's the only time that I will ever use that term.
That's because more often than not. The porn lady's will take strides (with their hormone regiment) in order to produce white cum.
But for non porn t-girls the most they can produce is the clear seminal fluid (that is if they ejaculate at all, with I do not).

But enough of my dislike for what the porn industry is doing to make it harder for regular trans girls.

I personally really like the taste of seminal fluid. It's generally sweeter than both seminal fluid and semen combined.

Though as others have mentioned... everybody is different so everyone has their own taste, witch can change depending on diet.