As with any aspect of collecting wine, what goes into your wine cellar is entirely up to you!
Do you prefer red wines more than white? White more than red? What about rose or sparkling wines?
How large do you want to build your cellar, and for what reason? Are you going to entertain guests often, or do you wish to collect wines to later give out as gifts? Or, do you happen to live in a remote location and so only visit your favorite wineries once per year?
All of these factors play into the decision making process of stocking your wine cellar.
If you’re set on a particular wine and love it to death, great! Buy a few bottles, or even a case. Set it aside and forget about it. It’s a foundation wine and will help you build a stock in your cellar. Next, try new wines. Try new wineries. Visit new tasting rooms. Expose your palate to new options and you may realize that you don’t want to limit yourself to a cellar full of just a few good wines. Instead, perhaps 2-3 bottles from a given winemaker is sufficient, and you want to then move on to another.
The size of your cellar is going to be based on amount of space, your budget, and your intended use for that cellar. If you do run out of space, you always have the option to trade wines with your friends, or simply create more space by enjoying some of the wines you’ve been collecting.