Choosing an internal vibrator can be overwhelming, with so many options available. Here are some factors to consider when selecting an internal vibrator:

1. Material: Internal vibrators can be made from a variety of materials, including silicone, plastic, metal, and glass. Consider what material feels most comfortable and pleasurable for you.
2. Size and shape: Internal vibrators come in a variety of sizes and shapes, so it's important to choose a vibrator that fits your body and your preferences. Consider the length, girth, and shape of the vibrator to ensure that it will provide the type of stimulation you desire.
3. Type of stimulation: Some internal vibrators are designed specifically for G-spot stimulation, while others are designed for more general internal stimulation. Consider what type of stimulation you're looking for and choose a vibrator that is designed to provide that type of stimulation.
4. Power and intensity: Internal vibrators come in a range of power and intensity levels, so it's important to consider what level of stimulation you prefer. Some vibrators have multiple speed settings, while others have pulsating or escalating patterns.
5. Noise level: If you're concerned about discretion, consider the noise level of the vibrator you're considering. Look for vibrators that are designed to be quiet or have a "whisper" mode.
6. Battery life: If you prefer cordless vibrators, consider the battery life of the vibrator you're considering. Look for vibrators that have a long battery life and are easy to recharge.
7. Brand reputation and customer reviews: Consider the brand reputation and read customer reviews to get an idea of what other users like and don't like about a particular vibrator.

Remember, choosing an internal vibrator is a personal decision, and what works for one person may not work for another. Take the time to explore your options, consider your preferences, and choose a vibrator that fits your needs and desires.