brownymasterWhy not list them? Exclude anything that involves icons/headers in threads though (even the i49 donator header kinda annoyed me visually). I'm sure enigma's open to good ideas that don't conflict with some of the design goals of the forum.
1. Ability to add streams to favorites (and when they are on favorites show them at the top of the list regardless of viewers)
2. Alert system for events or games (could work through e-mail alerts or steam) trade.tf has a pretty cool alert system (http://www.trade.tf/user/go_alert) that works through a tf2 bot that whenever there's a update to the game the bot sends you a text message on steam.
3. Customize number of posts per page, particularly extending to 100 posts or something like that.
4. Customize the number of upcoming events, latest articles, forum activity, community news that appear on the sidebar.
5. If there was a pm system + users could have an extended inbox or messagee limite (of course this isn't the situation atm)
6. Subscribe or favorite threads
7. Also not applicable to plus users only but everyone able to gift tf.tv plus to another user, as tl+ and reddit have.
8. A icon/badge showing you're a + member, name colors are cool and all but honestly I think this would be much more of a perk. besides, a favicon size badge won't mess with your minimalistic approach unless you have some kind of OCD
9. Private forum for plus users
10. Plus-users only giveaways or lotteries.
11. As I said before introduce other pricing plans like semestral or yearly subscriptions with a discount relative to the absolute price of course.
I could go on, but this is what I got so far. I'm not saying I want all of this and I want it now, I'm not delusional, but I do think the subscription value warrants a few more perks to be worth the 5$ monthly. Of course most of this is not coded atm or even possible at the moment but here are my suggestions