When you find out that you can enable the mouse on Vim...

Might be the case as beginner, but not really useful once you get too habituated to hardcore style vim.
mouse=a messes up your cursor selection

I usually stick with keybindings, but I have the mouse enabled where if I have to do something with a gui I can just click back to vim to save time

@Letmecode there's alot to do in vim while you're learning. turn off arrow keys, leave mouse off, turn off j and k(I don't), change leader key, etc. but after you get in the habit of using vim keybindings enabling the mouse isn't that bad cause if you have to switch to the browser and switch back to vim your hand is already on the mouse and it's quicker just to click on the panel that you need to be on instead of using keybindings to go to it, especially if your like me and have two files and a shell up

@Letmecode I use i3 myself so I get your point, but switching isn't specificity the point cause I tend to use Alt+2 to switch to my workspace that has firefox on it. it's just that browsers arnt made to be completely keyboard driven, so using the mouse is natural unfortunately.

ps: any vim newbies that read my beginning suggestions, you should remap the Esc key also. I use caps lock for this since it's not really used in development.

@jckimble Try Vimium / VimFX and thank me later.

@nullderef any improvement over Vimperator? I have it already and it does come in handy sometimes but it was taking longer during testing a spa I was working on then to just use a mouse

NOOOOOOOO, WHY WOULD YOU DO THAT?!

Well it's all about convenience at times, there is no hard and fast rule that you must not use that feature.
At times when you want to do changes at multiple places (like a csv file), that's a pretty handy feature