If your limited liability company (LLC) has more than one owner, you can choose to have the company taxed as either a corporation or a partnership. In the case of a single owner of an LLC, you can choose to have the company taxed as either a corporation or a sole proprietorship.
Because income flows through to you, from a tax standpoint, you've chosen to have your LLC taxed as a sole proprietorship (if you're the only owner) or as a partnership (if there's more than one owner). This is usually what most small business owners want. As you note, any profits flow through to your personal income taxes and you pay personal income tax on any net earnings of your business. So when you withdraw money from your LLC, it's a personal draw of funds that have been previously taxed. The actual withdrawal of funds for personal use is not a taxable event. The money was taxed when it was earned.
On the flip side, sole proprietors and partners may be liable for self-employment tax, which is the equivalent of Social Security tax that employees pay. (See IRS Publication 533 for more information about self-employment taxes.) There is a self-employment tax deduction which says that you may deduct one-half of your self-employment taxes from your personal income taxes, which will slightly reduce your income taxes. But, as a sole proprietor, usually any net earnings are subject to this self-employment tax, which currently runs about 15%.
If you're a sole proprietor, it's entirely up to you how much profit you remove from your business and spend on personal items. You and your company are considered the same economic entity. If you're in a partnership, the situation is more complex, because one partner might not like seeing the other partner raid the partnership piggybank. In partnerships and LLCs with multiple owners (and especially investors), how profits are allocated is set by the articles of organization.
So, the answer to your question in terms of what's best with regard to taxes is that it doesn't really matter. Your tax situation was determined when you determined your business structure. You will pay taxes as a sole proprietor (or a partner) on your net profits.