A completely random conversation is exciting, but sometimes you want someone who gets what you're talking about right away. That's what chatting by interests is for: you pick a few topics and are preferably matched with someone who picked the same.
Before you start a conversation you pick up to five interests, such as gaming, music or travel. Matching first looks for someone with an overlap. If nobody with the same interests is available, you still get connected quickly, so you never wait long.
On LiefdesKlik the top of the conversation shows which interests you share. That gives you an instant topic to start with.
Shared interests do three things at once:
Choose topics you love talking about, not what seems popular. The more specific, the better the conversation: "indie games" leads to a different chat than just "gaming".
Sometimes the best conversations are with someone who likes completely different things. So feel free to switch: sometimes by interests, sometimes fully random.
Pick what you love and talk to someone who loves it too.