SFW:
Wayne immensely loves Raj's empathy for others. He knows that if he's ever having a rough day he can rely on him to either comfort him or snap him out of whatever funk he's in. He also gets a big kick out of Raj's sense of humor and has been caught him off guard a fair amount of times with his jokes. Also, Raj matches his energy when it comes to pranks and the two have been known to cause quite the chaos together. Raj loves Wayne's high energy and enthusiasm, as well as his fun loving attitude. His unwavering support for him when he came out meant the world to him. Wayne's just this big, walking ball of sunshine and a big source of comfort to him. Also great for bear hugs. He also admires Wayne's leadership skills and strategy making during their games. He likes how Wayne just brings out the best in other people.
NSFW:
Whenever Raj takes a more dominant role during sex it drives Wayne absolutely wild. Being at his mercy gets him worked up, especially if it involves being tied up in some way. The first time that happened a light bulb went off in Wayne's head, lmao. "Oh shit, I really like this!" Raj enjoys the fact that Wayne is open minded enough to try new things out with him (ex: bondage, toys). Also, Wayne is veeery touchy-feely during sex, which Raj adores beyond belief. They both love the dirty talk and will purposely try to rile each other up just to see who can get who off first.
That's all I can think of off the top of my head rn. I'm sure more will come to me later, but I've got to hop off to bed. Have a good night anon!