hmmm, what's my "but"?...

as you all know, i'm semi-addicted to how i met your mother. now understand that i go on and on about my love for barney stinson because i just started watching it a few months ago. i know, i know! that's blasphemous! but i needed something distracting to watch so one of my dvd-addicted friends let me borrow season 1 and 2 of HIMYM. (and i just got season 3 in from netflix). so yes... i'm late to the game. don't judge.

i was watching season 3 disc 1 last night while i was whipping up a batch of my famous beer dip for a bbq after work today and episode 3.04 "little boys" came on... here is a little taste of the beginning...

lily: so, robin, i've got a guy for you. he's cute, he's funny, he's smart.
ted: what's his 'but'?
lily: what do you mean?
ted: when someone wants to set you up they always tell you the good qualities first but then they leave out their huge flaw.

(flashback to maclaren's, barney telling ted about a girl)

barney: she's totally hot and really fun.
barney: (to himself) but she has a dead tooth.

(flashback to maclaren's, marshall telling ted about a girl)

marshall: she's superhot and she's so successful.
marshall: (to himself) but she has a pug that she pushes around in a stroller.

(flashback to maclaren's, lily and ted sit at booth, lily tells ted about a girl)

lily: she's so cute and she's so smart.
lily: (to herself) but her last boyfriend had to get a restraining order against her and then his cat and new vacuum cleaner both went missing.
ted: wow, set it up.

(back to present scene)

ted: i'm still convinced she killed my turtle.
robin: hey, you know what, not every setup has a 'but'. what about, um, jamie, that girl that lily set you up with? she was really nice.
barney: if memory serves me, she had a huge 'but'. her huge butt. nailed it!

and then a bit later...

robin: yeah. hey, what's my 'but'? you know, i'm really nice, but...
ted: (to himself) but she's afraid of commitment.
lily: (to herself) but she's a gun nut.
barney: (to himself) but she's canadian.
marshall: (to himself) but she didn't like field of dreams.
barney: i can't think of anything.
ted: you don't have a 'but'.

so that got me thinking... what's my "but"?

i could probably guess (i push people away, i don't let people in, apparently i'm intimidating, i'm emotional, my actual butt, lol...) but i don't really know. i wonder what other people would say...

what's your "but"???