I almost always do.
If I'm able to provide as much help as possible, then I'll do so. But, I get annoyed if I give someone a hand (with anything) and they just keep using me to do all their work.
If someone wants me to show them how to do a piece of eventing (Usually newer members, as even I'm not that experienced), then I'll generally help them if I can, and if they've had a try at it.
Most of the time, it consists of newer players struggling to get Named Brick Events working.
(which provides extra problems, as they don't understand that you can only do Named Brick Events on a Named Brick that you own, so, I'll have to make an example for them)
I help with building things if possible too, although that's rarer. Generally, I get asked to do certain exterior structures (Roofing, mainly, and usually only by friends)
Although I do get annoyed with people using my kindness, I almost always help if it's not a major burden to myself or a burden to another person (So, I won't leave anyone who I'm already helping (Regarldess of how able they are) to help another person half way through)
I'm defintely too nice in otherways as well.
I quite often end up not shutting down my server because there is someone else on the server.
I feel bad if someone has joined to build and have fun, or see what I've done, and then I cut it short.
I quite often give warnings before I shut down, or apologize if someone joins after I've decided to shut down.
tl;dr, I'm too nice.