I'll put some votes in for whose posts I enjoy reading. I know it says to list your top 3, but I'm going to list 4. In total though, I'd love to list two others, but I'll keep it at 4.
1.
duckluv321 - Shea is the definition of a legendary forumer. She's been around for ages, and what shocks me the most is her maturity level at her age. She's someone whose posts I'll always read from top to bottom. She gets the top spot for me because she's one of the few who actually posts well thought out and well written guides. On top of all of that, she's probably the nicest person I've had the pleasure of chatting with. It's refreshing to see such a top quality person on the internet, a place where friendly is usually hard to find.
2.
G33ke - He doesn't post often these days, if at all. But his posts have always been long, detailed, and extremely well written. His posts are the exact kinds that I enjoy reading. Sure, funny troll posts are fun to read every once in a while, but they just get old for me. Informative and well thought out posts though, that's what I see as the best type of forum user. G33ke is that.
3.
Mooclan - Out of all of the people with massive post counts, your name is the one who I tend to remember the most. I'm a big believer of quality over quantity. A good portion of your posts are well thought out and enjoyable to read. I'd say more, but I'd just be repeating myself from what I've say about the other two. Keep on posting, because you and all of the other top post count people are the ones who are keeping these boards truly alive.
4.
SixZoSeven - Alright, I'm probably biased, because you don't post as much anymore as you used to (most of us don't these days). But I think your posts are generally just enjoyable to read, mostly because I relate to them a lot. Detailed, intelligent, well thought out posts are my favorites, and you have a handful of great ones!
Overall, I think a lot of people deserve to be on this list. If it weren't for a good portion of the active daily posters, these forums would be pretty dead aside from the clan posts. You are all pretty awesome, so keep on posting!